The numerator of a fraction is increased by 20% and denominator is decreased by

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The numerator of a fraction is increased by 20% and denominator is decreased by 20%. The value of the fraction becomes $4/5$. The original fraction is

Options:

A . $8/15$

B . $4/5$

C . $7/11$

D . $2/3$

Answer: Option A
Answer: (a)Original fraction = $x/y$= ${120/100x}/{y × 80/100} = 4/5$= ${120x}/{80y} = 4/5$ ⇒ ${6x}/{4y} = 4/5$= $x/y = 4/5 × 4/6 = 8/15$

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