# What is a ratio Khan Academy?

## What is a ratio Khan Academy?

A ratio is a comparison of two quantities. Learn how to find the ratio between two things, for example apples to oranges. Created by Sal Khan.

## How does Khan Academy calculate rates?

To find a unit rate, we divide the first quantity in a rate by the second. Example: A plane flew 765 kilometers in 3 hours. The plane flew at a rate of 255 kilometers per hour.

How do you solve ratios step by step?

Solving Ratio Word Problems

1. Identify the known ratio and the unknown ratio.
2. Set up the proportion.
3. Cross-multiply and solve.
4. Check the answer by plugging the result into the unknown ratio.

What is ratio formula?

The ratio formula for any two quantities say a and b is given as, a:b = a/b. Since a and b are individual amounts for two quantities, the total quantity combined is given as (a + b).

### How do you calculate a ratio?

Ratios compare two numbers, usually by dividing them. If you are comparing one data point (A) to another data point (B), your formula would be A/B. This means you are dividing information A by information B. For example, if A is five and B is 10, your ratio will be 5/10.

### What grade are ratio GCSE exam questions aimed at?

These videos deal with ratio – GCSE exam questions and are aimed at around grade 3, although they can be a little challenging. There’s quite a lot of words, and it’s good to try to ‘sketch’ out the question to help with understanding.

What is ratio in maths GSCE?

Help your students prepare for their Maths GSCE with this free Ratio worksheet of 15 multiple choice questions and answers. Download Free Now! Ratio often appears alongside proportion and the two topics are related. Whereas ratio compares the size of different parts of a whole, proportion compares the size of one part with the whole.

What are ratio questions in KS3?

In KS3 ratio questions ask you to write and simplify a ratio, to divide quantities into a given ratio and to solve problems using equivalent ratios. 1. In Lucy’s class there are 12 boys and 18 girls.

#### How many students have we helped with maths GCSEs?

Since 2013 we’ve helped over 100,000 primary and secondary students become more confident, able mathematicians. Find out more about our GCSE Maths Revision Programme or request a personalised quote for your school to speak to us about your school’s needs and how we can help.