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20 of what number is 40?

Question:

20% of what number is 40?

Working with Percentages:

Here we will find out an unknown value such that when a known percentage (20%) is taken of this value, it simplifies to a known result (40). In order to solve this, we can use simple algebraic techniques such as multiplication and division.

Answer and Explanation:

The answer is 200. To start this equation, we know that 20% of an unknown number is 40. We would like to know what this number is.

To start, convert...

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Solve Problems Using Percents

from ELM: CSU Math Study Guide

Chapter 3 / Lesson 7
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