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Designate the unknown number by x. Then (60 %)x = 21, or 0.6x = 21, or x = 35

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15y ago

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Wiki User

12y ago

21 x 60 / 100 = 12.6

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Wiki User

13y ago

60% * x = 2,1

x=3.5

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Q: 21 is 60 percent of what number?
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