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To find the number that 0.4 is 8 percent of, you can set up a proportion. Let x represent the unknown number. The proportion can be written as 0.4/x = 8/100. Cross multiply to solve for x, which gives you 0.4 * 100 = 8x. Simplifying further, you get 40 = 8x. Dividing both sides by 8 gives you x = 5. Therefore, 0.4 is 8 percent of 5.

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Q: 0.4 is 8 percent of what number?
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