Idk this pleaseee help

20%

Step-by-step explanation:

Remember that percentages can be thought of as part over whole.

1. Find how much water evaporated.

[Starting amount]-[amount evaporated]=[amount left]

2,500,000 - x = 2,000,000

Solve for x

500,000-x=0

x=500,000.

This is how many liters were evaporated.

2. Set up a ratio to see what percentage was evaporated

=  

x is the percentage you are looking for, and it is over one hundred because that is the "whole" of percentages: 100%. Remember that this is part over whole.

3. Simplify ratio and solve for x

simplifies to (divide top and bottom by the number that will get your denominator to be 100, which is 25,000)

Your answer is 20% since you have found what number goes in for x

a

step-by-step explanation: