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4 March, 23:58

12 is 30% of what number

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  1. 5 March, 01:56
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    30% * n = 12 → you know that : 30% = 30/100

    (30/100) * n = 12 → you know that : 30/100 = 3/10 = 0.3

    0.3 * n = 12 → then divide by 0.3 on each side

    0.3 * n/0.3 = 12/0.3 → you simplify

    n = 40 of the number 40
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