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14 October, 14:32

Susan is creating a solution. A formula for the solution calls for 7/10 mL of water. Susan wants to make 2/7 less of the solution than the formula creates.

How much water should Susan use?

Express your answer as a fraction in simplest form.

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Answers (2)
  1. 14 October, 14:41
    0
    7|10 - 2|7 is the answer because she needs to use 7/10 but she wants to make 2/7 less so you subtract 2/7 from 7/10 and that's the answer
  2. 14 October, 14:53
    0
    Susan wants 2/7 less of the solution. The whole solution is equivalent to 1. So she wants the amount: 1 - 2/7 = 5/7 mL.

    She takes 5/7 mL of 7/10 mL.

    Therefore (5/7) * (7/10) = 35/70 = 1/2 mL
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