A swimming pool has 2.5 million liters of water in it. Some water evaporated and then the pool only has 2 millions liters in it. What percent of the water evaporated?

20% of the water evaporated

Step-by-step explanation:

We know that 500,000 evaporated because 2,500,000-2,000,000 is 500,000.

100% - 2,500,000

500,000 - x%

2,500,000/500,000 = 100/x

x = (500,000) (100) / 2,500,000

x = 20%

20% of the water evaporated.

20% was evaporated

Step-by-step explanation:

Formula:

((New value-old value) / (old value)) * 100

((2-2.5) / (2.5)) * 100 = 20