When Louise had her first car, 50 litres of petrol cost £40. When she filled up the other day, she noticed that 40 litres of petrol cost £50.
By approximately what percentage has the cost of petrol increased over this time?
Select one option, then click Submit.
50%
56%
67%
75%
80%
Select an option, then submit.
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Senior Mathematical Challenge 2015 (2015)
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