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17 June, 21:22

At noon, a tank contained 10 cm of water. after several hours, it contained 7 cm of water. what is the percent decrease of water in the tank?

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  1. 18 June, 00:45
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    Amount of decreased water = 3/10

    Then, it would be 3/10 * 100 = 30%

    So, your answer is 30%
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