The numerator of a fraction is 3 less than its denominator. If 2 is added to both the numerator and the denominator, the fraction becomes 4/5. What is the original fraction?
Correct answer D. 10/13
Explanation
Let it be n/(n + 3). (n + 2)/(n + 5) = 4/5 gives 5n + 10 = 4n + 20, so n = 10 and the fraction is 10/13.
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