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Find number given a percent

Teaching Transcript

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9 is 30 percent of what number?

Let's write this out. 9 out of some number is equal to 30 out of 100, or 30 percent

We can rearrange the terms to solve. Our mystery number is 9 times 100, divided by 30

Cancelling zeroes, that's 90 divided by 3, or 30

So 9 is 30 percent of 30

This math skill teaches how to find an original quantity given a number that represents a specific percentage of it. The method involves setting up a proportion and solving for the unknown original number.

Skill Practice

Find original number given number that is percent of it

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