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16 November, 22:27

At noon, an aquarium contained 20 gallons of water. After several hours, it contained 18 gallons of water. What is the percent decrease in the water of the tank?

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  1. 17 November, 01:41
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    The tank decreased from 10cm to 7 cm so the tank had lost its 3cm of the water. 3cm was the 30% of lost from water. So there was a 30% decrease from water tank.
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