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02-07-2018
Mathematics

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A water bill has increased by 25% to £52.50 work out the original cost?????

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harpazo harpazo

02-07-2018

100% - 25% = 75%

52.50 = 75% of what number?

52.50 = 0.75x

Let x = original cost

52.50 ÷ 0.75 = x

70 = x

The original cost was £70.

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