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Percent change in a shrinking number

This math skill teaches how to calculate percent change when a number decreases. It involves finding the absolute difference between the initial and new numbers, then determining what percentage this difference represents of the original number.

Learn percent change in a shrinking number

Teaching Transcript

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What is the percent change if 80 shrinks to 64?

First we need to find the absolute change by subtracting. It's a change of 16

Now, what percent of 80 is 16

We know that 8 is 10% of 80. 16 is twice that, so 16 is 20% of 80

So shrinking from 80 to 64 is a decrease of 20%

Skill Practice

Percent change in a shrinking number

Test your understanding of percent change in a shrinking number by practicing it! Work through the below exercises to use it in practice.