math

The ratio of the number of male lions to female lions in the animal reserves is 21:20. If there are 123 lions in the animal reserve, how many of the lions are female?
Thank you!

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  1. m = number of male lions

    f = number of female lions

    m / f = 21 / 20 Multiply both sides by 20

    20 m / f = 21 * 20 / 20

    20 m / f = 21 Multiply both sides by f

    20 m * f / f = 21 * f

    20 m = 21 f Divide both sides by 20

    20 m / 20 = 21 f / 20

    m = 21 f / 20

    m + f = 123
    ________________________________

    Remark f = 20 f / 20
    ________________________________

    21 f / 20 + 20 f / 20 = 123

    41 f / 20 = 123 Multiply both sides by 20

    41 f * 20 / 20 = 123 * 20

    41 f = 2460 Divide both side by 41

    41 f / 41 = 2460 / 41

    f = 2460 / 41 = 60

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  2. idk

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  3. this is bull crap

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