Question
A fraction increases by 35% when 25 is added to its
numerator and its denominator is multiplied by 10. What is the numerator of the original fraction?Solution
Let the original fraction be = 
According to the question,
Or, 270xy = 20xy + 500y
Or, 250xy = 500y
Or, x = 2
So, numerator of the original fraction = 2
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