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30 percent of what equals 21?

Anonymous

∙ 15y ago

Updated: 4/28/2022

30%=30/100

30/100x=21

100/1(30/100)x=100/1(21)

30x=2100

30x/30=2100/30

x=70

Wiki User

∙ 15y ago

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Given 20 and 50%, multiply 20 by 0.5, which equals 10. Given 70 and 30%, multiply 70 by 0.3, which equals 21. Or if you prefer, given 20 and 50%, multiply 2 by 5, which equals 10. Or if you prefer, given 70 and 30%, multiply 7 by 3, which equals 21.

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