National 5 Portfolio Applications 1.3 Fractions and Percentages
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1 National Portfolio Applications. N Section A - Revision This section will help you revise previous learning which is required in this topic. R I can perform calculations involving fractions without a calculator. Perform the following calculations without a calculator, expressing your answer in its simplest form: (d) 8. Perform the following calculations without a calculator, expressing your answer in its simplest form: (d) Perform the following calculations without a calculator, expressing your answer in its simplest form: (d) (e) (f) (g) (h) R I can convert between fractions, decimals and percentages.. Write each of these percentages as (i) (ii) an equivalent decimal fraction an equivalent vulgar fraction in its simplest form 0% 80% % (d) % (e) 44% (f) 66 % (g) % (h) 77%
2 . Write each of these vulgar fractions as (i) (ii) an equivalent decimal fraction an equivalent percentage (d) 7 0 (e) 9 0 (f) (g) (h) 0. Write each percentage increase or decrease as a single percentage (i) example a 0% increase is equivalent to 0%. (ii) example a 0% decrease is equivalent to 90%. 0% increase 60% decrease % increase (d) % decrease (e) % decrease (f) 8% increase (g) % decrease (h) 8% increase (i) % decrease
3 Section B - Assessment Standard Section This section will help you practise for your Assessment Standard Test for Fractions and Percentages. (Applications.). Ross bought a new motorbike for Its value decreased by 8% each year. Find the value of the motorbike after years.. Declan bought a new watch for 000. Its value increased by 6% each year. Find the value of the watch after years.. Clare measures the length and breadth of a table top as shown in the diagram below. m m 4 m 4 m (i) Calculate the exact area of each table top (in m ). (ii) Calculate the exact perimeter of each table top. (Note: even when using a calculator to obtain the answer, all appropriate working must be shown to display your understanding and receive all marks) 4. A trainee in a garden centre monitors the growth of young plants. The height of the plant a found to increase by % to 40 cm. Find the height of the plant when the trainee started to monitor it. The height of another plant is found to decrease by 6% to 7 cm. Find the height of this plant when the trainee started to monitor it.
4 Section C Operational Skills Section This section provides problems with the operational skills associated with Fractions and decimals. O I can find an initial quantity given the final value and percentage increase/decrease (backward percentages).. Kerry bought a car in 006. When she sold it four years later, she found that it had reduced in value by 60% and she received only How much had Kerry paid for the car in 006?. Tony s train fare has just gone up by 0%. His new fare is.8. What was Tony s train fare before the price increase?. A computer is sold for 6.0. This price includes VAT at 0%. Calculate the price of the computer without VAT. 4. James bought a car last year. It has lost.% of its value since then. It is now valued at 487. How much did James pay for his car?. After a 0% pay rise Louise s wage for her full time job went up to What was her pay before her rise? 6. In a sale, all cameras are reduced by 0%. A camera now costs 4. Calculate the original cost of the camera. 4
5 7. Due to poor support a season ticket for East Kilbride United has reduced its season tick price to 400. If this was a 0% reduction on the cost of last year s season ticket, what was the cost of last year s season ticket? 8. Mark takes some friend out for a meal. The restaurant adds 0% servise charge to the price of the meal. The total bill is What was the pice of the meal? 9. A car is valued at 780. This is 6% less than lasy tear s value. What was the value of the car last year? 0. The price for Paul s summer holiday is The price includes a 4% booking fee. What is the price of his holiday without the b ooking fee?. This year, Bewn paid 60 for his car insurance. This is an increase of 0% on last year s payment. How much did Ben pay last year?
6 O I can calculate a final value given a series of different percentage increase/decrease.. A new luxury villa in Florida is valued at $7000. It is expected to rise in value by % during its first year and 0% during its second year. What will the value of the villa be after years?. Mr Dodds buys a Honda Civic Type R for 000. It depreciates in value by % during its first year and 8.% during its second year and % in its third year. How much will Mr Dodds car be worth after years?. Jorge buys a new house for The value of the house depreciates by 8% in the first year. However it appreciates by 4% in the second year. How much would his house be worth at the end of the second year? 4. Company shares worth,00 depreciate in value over a month by %, but they then appreciate in value by % over the next month. Are the shares now worth more or less than they were originally? Justify your answer with full working.. The Pollards bought a bungalow for 0,000. It appreciated in value for the next three years by 8% in year, by 6 % in year and by % in year. How much was the bungalow worth after years? 6
7 O I can calculate a final value given a series of constant percentage increase/decrease (recurring percentages).. Patrick buys 400 of bonds which have a guaranteed return on investment of % per annum compounded for 4 years. How much will the bonds be worth at the end of the fourth year?. Katie invested 0 on the stock exchange. However her investment was not a good one and her shares lost 8% of their value every year for three years. How much was her investment worth at the end of the third year?. Calculate the compound interest on 600 for 0 years at 6% p.a. 4. Mrs Black deposits 600 in a bank and leaves it there for three years to gain compound interest at % per annum. Calculate how much is in her account after years?. There are 69 million vehicles in Scotland. It is estimated that this number will increase at a rate of 4% each year. If this estimate is correct, how many vehicles will there be in years time? Give your answer correct to significant figures. 6. Ian s annual salary is His boss tells him his salary will increase by % per annum. What will Ian s salary be after years? 7
8 7. An industrial machine cost Its value depreciates by 4 % each year. How much is it worth after years? Give your answer correct to three significant figures. 8. Calcualte the compound interest earned when is invested for 4 years at 4 % per annum. 9. It is estimated that house prices will increase at the rate of % per annum. A house is valued at If its value increases at the predicted rate, calculate its value after years. Give your answer to four significant figures. 0. Olga normally runs a total distance of 8 miles per week. She decides to increase her distance by 0% a week for the next four weeks. How many miles will she run in the fourth week?. It is estimated that an iceberg weighs tonnes. As the iceberg moves into warmer water, its weight decreases by % each day. What will the iceberg weigh after days in the warmer water? Give your answer to significant figures.. Alistair buys an antique chair for 600. It is expected to increase in value at a rate of 4 % each year. How much is it expected to be worth in years? 8
9 Section D - Reasoning Skills Section. Jamie is going to bake cakes for a party. He needs of a block of butter for cake. He has 7 blocks of butter. How many cakes can he bake?. Due to the threat of global warming, scientists recommended in 00 that the emissions of greenhouse gases should be reduced by 0% by the year 00. The government decided to reduce the emissions by % every ten years, starting in the year 00. Will the scientists recommendations have been achieved by 00? You must give a reason for your answer.. A new fraction is obtained by adding x to the numerator and denominator of the fraction 7 4. The new fraction is equivalent to. Calculate the value of x. 4. A company makes larger bags of crisps which contain 90 grams of fat. The company aims to reduce the fat content of the crisps by 0%. They decide to reduce the fat content by 0% each year. Will they Have achieved their aim by the end of the rd year? Justify your answer. 9
10 Answers Section A Revision R Q 40 (d) 4 Q (d) 7 Q (d) 4 (e) 4 (f) 7 (g) (h) R Q(i) 0 (ii) 0 (i) 0 8 (ii) 4 (i) 0 (ii) 7 0 (d)(i) 0 (ii) (e) (i) 0 44 (ii) (f)(i) (ii) (g) (i) 0 (ii) 4 (h)(i) 0 77 (ii) Q(i) 0 7 (ii) 7% (i) 0 06 (ii) 6% (i) 0 8 (ii) 80% (d)(i) 0 7 (ii) 70% (e) (i) 0 4 (ii) 4% (f)(i) 0 (ii) % (g) (i) 0 6 (ii) 60% (h)(i) 0 (ii) 0% Q 0% 40% % (d) 6% Section B (e) 88% (f) 8% (g) 9% (h) 08% (i) 97% () 4 40 () () a(i) A = 4 m (ii) P = (4) a 7 cm b 9 6 cm m b (i) A = 4 4 m P = m 0
11 Section C O () 600 () 0 () 7 08 (4) () (6) 6 (7) 00 (8) (9) 400 (0) 860 () 00 O () $7 00 () 96 0 () (4) 9 8 () O () 7 4 () 48 8 () (4) () 0 million (6) (7) 000 (8) (9) (0) 4 miles () 47 tonnes () Section D () 7 cakes () No, as 0% reduction is 0 and (0 8) 4 = 0 of a reduction. () x = (4) 0% would have 4g (0 8) 0 x 90 = 46 08g So they will not achieve their aim of 4g in years as 46 08g > 4g.
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