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31 December, 02:58

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

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  1. 31 December, 03:03
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    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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