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15 March, 17:45

21 is 75% of what number?

I don't get it.

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Answers (2)
  1. 15 March, 19:04
    0
    21=75/100x

    2100=75x

    X=2100/75=28
  2. 15 March, 20:35
    0
    21 is 75% of 28. If you use a calculator, you can just put 21*100:75. Or if you need to do it on paper, you could do ...

    1. do 75/100*21

    2. multiply both sides by 100 and the divide by 75
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