1 liter = 1000 milliliters so we can find it out by taking 1000 ml and subtracting 375 ml from 1000 milliliters. 1000 - 375 = 625 milliliters left. Also, if they want the answer in liters, we can find this out since we know that 1 liter = 1000 milliliters.
Answer in liters and percent

This is saying we have .625 of a liter left or we have 62.5% left