Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 2 million liters of water in it. what percent of the water evaporated?

Original volume = 2.5 million liters.
After evaporation, the remaining volume is 2 million liters, therefore
Evaporated volume = 2.5 - 2 = 0.5 million liters.

Percent of water evaporated = 100*(0.5/2.5) = 20%

20%

If jon had $4.00 then takes away $2.25, then he should have $1.75 left. $4.00 - $2.25 = $1.75 hope this ; )