# Comparing Quantities with Percent 07:21 minutes

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**About this Video Lesson**

## Description

After this lesson, you will be familiar with using the equation Quantity=Percent x Whole to set up and solve percent problems.

The lesson begins by teaching you how to set up a proportion to calculate the percent of a number. It leads you to solving for unknown parts of the equation, Quantity=Percent x Whole. It concludes with using square grids to find quantities and compare percents.

Learn about comparing quantities with percents by helping Maryam with her recycling project!

This video includes key concepts, notation, and vocabulary such as the term quantity (equivalent to the word part in the original percent formula) and the equation, Quantity = Percent x Whole.

Before watching this video, you should already be familiar with the definition of percent, (as part per 100). You should also be comfortable with solving percent problems where you are given two out of the three values, part, percent, and whole, and are able to find the third value using a visual tool or algebraically.

After watching this video, you will be prepared to learn how to solve more complex percent problems like problems involving multiple quantities or quantities which are subsets of other quantities, which they know the values of.

Common Core Standard(s) in focus: 7.RP.A.1, 7.RP.A.2c, 7.RP.A.3

A video intended for math students in the 7th grade

Recommended for students who are 12 - 13 years old

### The Author

**Chris Reger**

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**Comparing Quantities with Percent**