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11 March, 23:28

90% of what number is 81

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Answers (2)
  1. 12 March, 01:03
    0
    81/x = 90/100

    8100 = 90x

    8100/90 = x

    x = 90
  2. 12 March, 02:51
    0
    (81/90) * 100

    (9/10) * 100

    90
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