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Formation of Algebraic Expressions

If 90

Question

If $90$ % of $y$ is $x$ then what % of $x$ is $y$ ?

10

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0.25

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111.11

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90.29

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Solution

The correct option is B $111.11$
$x = 90$ % of $y = 9 y / 10$
$x / y = 9 / 10$
$y / x = 10 / 9$
Let, $y = z$ % of $x = z x / 100$
$y / x = z / 100$
$10 / 9 = z / 100$
$z = 1000 / 9 = 111.11$ %

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