Question:If `x%` of a is the same as `y%` of b, then `z%` of b is 

A `(yz)/x% f a` 
B `(xy)/z% of a` 
C `(xz)/y % of a` 
D None of these 

+ Answer
C 

+ Explanation
`x% of a`

`= y% of b ⇒ x/100 a`

`= y/100 b ⇒ b`

`= (x/100 xx 100/y) a`

`= (x/y) a`

`:. z% of b`

`= (z% of x/y) a`

`= ((xz)/(y xx 100)) a`

`= ((xz)/y)% of a.`

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