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    If 15% of A is equal to 18% of B, then what percentage of B is equal to 20% of A?
    Question

    If 15% of A is equal to 18% of B, then what percentage of B is equal to 20% of A?

    A.

    25%

    B.

    42%

    C.

    24%

    D.

    20%

    Correct option is C

    Given:

    15% of A = 18% of B

    Solution:

    15% of A = 18% of B

    ​15A = 18B

    A = 1815\frac{18}{15}​B = 65\frac 65​B

    x% of B = 20% of A

    x100×\frac{x}{100}\times​B = 20100×\frac{20}{100}\times​A

    x100×\frac{x}{100}\times​B =20100×\frac{20}{100}\times65\frac 65 B​

    x = 20×65\times\frac 65​​

    x = 24

    Therefore, 24% of B is equal to 20% of A.

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