Define Ratio and Proportion

Introduction

In this lesson, you will learn the basics about ratios and proportions. This is a very important lesson because you will be using this topic for our coming up topics on percentages as well. So let's begin!

Ratio

Ratio is just a comparison between two different quantities.

Here are some examples of real-life ratios:

• 70 miles per hour
• 1 teacher per 25 students
• 5 pencils per pencil pouch
• 6 stickers per page

Ratios can be written in 3 different ways:

15:1
15/1
15 to 1

Proportions

Proportions are just two fractions that are the same or equal. They are used to compare ratios.

Proportions can be written like the following:

1/4 and 6/24

The above fractions are equal so they are proportions!

 Sheet 1 What is Ratio and Proportion