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10% of 90 is 9. The easiest way to find this answer is to simply drop the zero from 90 to find 10%. This works with any number ending in zero (i.e. 10% of 50 is 5, 10% of 2,000 is 200). If you want to find 10% of a number that doesn't end in zero, just move the decimal one place to the left (i.e. 10% of 99 is 9.9, 10% of 35 is 3.5).

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9y ago

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