Question

A swimming pool had 2.52.52, point, 5 million liters of water in it. Some water evaporated, and then the pool only had 222 million liters of water in it.

Answer 1

20 % is the right answer

Answer 2

The swimming pool had 2.5 million liters of water in it

After some was evaporated , the remaining was 2 million liters

2.5 millions...................100%

2 millions........................x

x = (2/2.5)*100% = 80 %

This means that (100-80)%------ > 20% (0.5 million liters) was evaporated