A water tank contains 400 litres of water. 120 litres of water is taken out of it. Find the percentage decrease in the amount of water.

Given:

A water tank contains 400 litres of water. 120 litres of water is taken out of it. 

To do:

We have to find the percentage decrease in the amount of water.
Solution:

The amount of water left in the tank $=$ Total amount of water $-$ Amount of water taken out

$=400-120$ L

$=280$ L

 Percentage decrease in the amount of water $=\frac{Amount\ of\ water\ taken\ out}{Total\ amount\ of\ water}\times100$%

$=\frac{120}{400}\times100$%

$=30$%

There is a 30% decrease in the amount of water.

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Updated on: 10-Oct-2022

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