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22 September, 07:50

3:4 = 15:20 True or False. Explain your reasoning.

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Answers (2)
  1. 22 September, 10:39
    0
    The question is if the two proportions are equal:

    3:4

    = 3 (5) : 4 (5)

    that is, we just multiply both sides of the proportion by the same number and so we have:

    3:4

    = 3 (5) : 4 (5)

    = 15:20

    therefore:

    3:4 = 15:20
  2. 22 September, 10:51
    0
    3:4 = 15:20 because 3 can go into 15 an 4 can go into 20.
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