Question

 If the numerator of a fraction is decreased by 20% and the denominator of the same fraction is increased by 30%, then what fraction of the old is the new fraction ?

A 3/2 Correct Answer Incorrect Answer
B 6/13 Correct Answer Incorrect Answer
C 8/13 Correct Answer Incorrect Answer
D 2/3 Correct Answer Incorrect Answer

Solution

Solution -let the fraction = x/y

Decrease by 20% in numerator and increase by 30% in denominator.

=(x×80/100)/(y×130/100)

=8x/13y

fraction of the old is the new fraction=(8x/13y) ×y/x

=8/13.

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