Find Percent of a Whole Number

The video tutorial explains how to calculate the remaining water in a bottle after a student drinks 25% before soccer practice and 1/3 after practice. Starting with 500 milliliters, the tutorial demonstrates the calculations step-by-step, using mental math to find 25% of 500 milliliters and 1/3 of the remaining 375 milliliters. The final amount of water left is 250 milliliters.

What is the total amount of water left in the bottle after the student drank?

Explain how to calculate 25% of a whole number.