math

Two numbers are in the ratio 7:9. The smaller number is 42 , what is the larger number?

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  1. 42 = 7*6
    so,
    7:9 = 7*6 : 9*6 = 42:54

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  2. 7/9 = 42/n.
    7n = 378,
    n = 54.

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  3. Or just 42 *(9/7)

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