# What is a ratio?

### Description

Maths (Number) Mind Map on What is a ratio?, created by abbylebus on 05/13/2013.
Mind Map by abbylebus, updated more than 1 year ago
 Created by abbylebus over 10 years ago
132
0

## Resource summary

What is a ratio?
1. A ratio is used to compare two or more quantities. The symbol for ratio is two dots (:).
1. For example, 12 red apples compared to 20 green apples is written as 12 : 20
1. To put ratios in their simplest form, divide both parts of the ratio by the highest common factor. (HCF)
1. For example: 12 : 20 (divide both parts by 4) = 3 : 5
1. To express the ratio 3 : 5 in the ratio 1 : n, divide both sides by 3.
1. 3 : 5 =3/3 : 5/3 = 1 : 1 - 2/3 Or 1 : 1.6666....

### Similar

maths notes
Mathematics
DECIMALS FOR SCHOOL
GCSE Maths: Algebra & Number Quiz
All AS Maths Equations/Calculations and Questions
Fractions and percentages
GCSE Maths Symbols, Equations & Formulae
FREQUENCY TABLES: MODE, MEDIAN AND MEAN
HISTOGRAMS
CUMULATIVE FREQUENCY DIAGRAMS
GCSE Maths: Understanding Pythagoras' Theorem