maths

1. which ratios from a proportion
3/15 12/22
8/24 12/35
5/18 25/90
4/11 16/25

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  1. Find a common multiplier.

    3/15 12/22
    3 * 4 = 12; 12 * 4 = 48 -- nope

    5/18 25/90
    5 * 5 = 25; 18 * 5 = 90 -- yep!

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