# Ratios, rates, proportions

Contents

Learn all about proportional relationships. How are they connected to ratios and rates? What do their graphs look like? What types of word problems can we solve with proportions?

Ratios show up everywhere in life—sports, finance, medicine, cooking, you name it! In this tutorial, we learn what ratios are and how to use them.

Practice solving ratio word problems like, "If 60 cherries go in 3 pies, how many cherries go in 9 pies?"

Learn about a special type of ratio called a rate. A rate is the ratio of two measurements that have different units such as 10 kilometers per hour or 12 hot dogs per minute!

Percent literally means "per cent" or "per hundred". Learn how to rewrite fractions as percents and vice versa.

Decimals and percents are two ways of expressing the same number. For example, 0.5 and 50% mean the exact same thing. Learn how to convert decimals to percents and vice versa.

Learn how to solve percent problems like these: What is 80% of 25? Three is what percent of four?

Learn how to solve a variety of word problems involving percentages.

Learn how to tell whether two quantities are proportional by thinking about equivalent ratios and drawing graphs.

Learn how to write proportions and how to solve proportions.