AQA · Mathematics · 8300
GCSE Maths: Money: Proportion
Ratio & Proportion · AQA GCSE Maths (8300). Cards are generated from the Corbettmaths practice questions for Money: Proportion (Corbettmaths Video 400), and every card links back to the exact page it came from. Practice tests generate fresh variations of these questions, so the numbers change every attempt. Source material © Corbettmaths — used with attribution.
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5 hats cost £45. What do 8 hats cost?
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£72. One hat costs £45 ÷ 5 = £9, so 8 × £9 = £72.
A 20-minute phone call costs 80p. What does a 45-minute call cost?
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£1.80. Each minute costs 80p ÷ 20 = 4p, so 45 × 4p = 180p.
3 tyres cost £651 in total. What do 4 of the same tyres cost?
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£868. One tyre costs £651 ÷ 3 = £217, so 4 × £217 = £868.
7 magazines cost £41.65. What do 3 magazines cost?
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£17.85. One magazine costs £41.65 ÷ 7 = £5.95, so 3 × £5.95 = £17.85.
4 coffees cost £19.56 and 9 teas cost £18.72. What do 11 coffees and 2 teas cost?
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£57.95. Coffee = £4.89 each (11 × £4.89 = £53.79); tea = £2.08 each (2 × £2.08 = £4.16); total £57.95.
8 pens cost £2. What change from £20 is left after buying 55 pens?
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£6.25. One pen costs 25p, so 55 pens cost £13.75; £20 − £13.75 = £6.25.
Maya saves £49.40 in 13 weeks. How much does she save per week?
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£3.80 per week (£49.40 ÷ 13).
Maya saves £3.80 a week for 40 weeks, then her mother adds 30%. Can she afford a £200 present?
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No. 40 × £3.80 = £152; adding 30% gives £152 × 1.3 = £197.60, which is £2.40 short of £200.
A holiday costs 12 instalments of £280. What is each instalment if paid over 25 months?
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£134.40. Total cost is 12 × £280 = £3360, and £3360 ÷ 25 = £134.40.
Finding the cost of one item first, then multiplying up, is called the ? method.
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unitary
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