The concept of ‘Multipliers‘ is a useful one to know when dealing with percentage increase (or decrease) as it allows you to work out the ‘final’ value or the answer in one step.

Suppose we are asked to increase 200 by 17%

With multipliers, the opration of increasing or decreasing a number by a percentage is a one step operation. This means you need to be comfortable with working out the multiplier given the percenatge increase (or decrease) you are given. Here is how it is done..


3 examples showing a percentage increase using multipliers

Percentage INCREASE using Multipliers


The examples below show a perccentage decrease with multipliers. Here, we are SUBTRACTING the percentage from 100% when working out a percentage decrease.

Percentage DECREASE using Multipliers

Numbers - Percentages (%)
Numbers - Highest Common Factor (HCF) & Lowest Common Multiple (LCM)