Ratio (Part 2)

HCF

Highest Common Factor

LCF

Lowest Common Factor

A ratio of a : b is said to be in its simplest form

If a and b are integers with no common factors other than 1

First way to express a ratio in its simplest form

Divide the quantities by the HCF

Second way to express a ratio in its simplest form

Multiply the quantities by the LCF

24:20 in simplest form

6:5

12:42:24 in simplest form

2:7:4

HCF of 32:12

Divide by 4

0.04:0.12 in simplest form

1:3

HCF of 14:21

Divide by 7