Printable · GCSE Foundation · ages 14-16

Proportion as equality of ratios worksheet — GCSE Foundation

Fifteen questions on "proportion as equality of ratios" — DfE statement R7. Print it, or print three versions so neighbours cannot copy by letter; the key gives the letter for each version.

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Proportion as equality of ratios worksheet — GCSE Foundation

Maths · GCSE Foundation · R7 · Proportion as equality of ratios · Non-calculator · 15 questions

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1.A car travels at a constant speed. It travels 150 miles in 3 hours. At the same speed, work out how far it travels in 5 hours.
(a)90 miles
(b)200 miles
(c)250 miles
(d)300 miles
2.A science technician mixes 400 g of a salt solution of concentration 5% with 100 g of a salt solution of concentration 25%. Work out the concentration of the mixture.
(a)21%
(b)0.9%
(c)9%
(d)15%
3.A printer prints pages at a constant rate. It prints 45 pages in 6 minutes. Work out how many pages it prints in 10 minutes.
(a)70 pages
(b)55 pages
(c)27 pages
(d)75 pages
4.Ollie says that the ratio 6 : 15 is equivalent to the ratio 2 : 5. Is he correct? Give a reason for your answer.
(a)Yes — dividing both parts of 6 : 15 by 3 gives 2 : 5
(b)No — ratios must start with an even number to simplify
(c)No — 15 ÷ 6 isn't whole, so it can't simplify
(d)No — 6 : 15 simplifies to 3 : 5, not 2 : 5
5.Two numbers are in the ratio 5 : 8. The larger number is 40. Work out the smaller number.
(a)64
(b)45
(c)25
(d)35
6.The ratio of the number of red beads to blue beads in a bracelet is 3 : 7. There are 21 blue beads. Work out the number of red beads.
(a)14
(b)9
(c)49
(d)24
7.The ratio of the amount of money Harry has to the amount of money Isla has is 5:3. Harry has £35. Work out how much money Isla has.
(a)£7
(b)£28
(c)£21
(d)£33
8.£96 is shared between Ben, Cara and Dev in the ratio 2:3:7. Work out how much Cara receives.
(a)£16
(b)£56
(c)£28.80
(d)£24
9.Two numbers A and B are in the ratio 3:5. When 6 is added to B, the ratio of A to the new value of B is 1:2. Work out the value of A.
(a)18
(b)30
(c)9
(d)6
10.The ratio of cats to dogs in a shelter is 3:4. There are 18 cats. Work out the total number of animals in the shelter.
(a)42
(b)126
(c)25
(d)24
11.5 decorators paint 3 rooms in 6 hours. All the decorators work at the same rate. Work out how long it takes 10 decorators to paint 5 rooms.
(a)3 hours
(b)10 hours
(c)5 hours
(d)6 hours
12.The ratio of the amount Noah has saved to the amount Grace has saved is 4:5. Noah has saved £200. Work out how much they have saved altogether.
(a)£250
(b)£400
(c)£450
(d)£360
13.The ratio of the number of pages Mia has read to the number of pages Leo has read is 7 : 4. Mia has read 84 pages. Work out how many pages they have read altogether.
(a)147
(b)231
(c)48
(d)132
14.y is directly proportional to x. When x = 8, y = 20. Work out the value of y when x = 12.
(a)14.5
(b)4.8
(c)30
(d)24
15.A solution is made by dissolving 50 g of sugar in 200 g of water. Work out the concentration of sugar in the solution as a percentage.
(a)20%
(b)25%
(c)80%
(d)0.2%

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