Saving = S, Expenditure = E, Income = I

At the end of 12months; 12S=3E=3(I-E)

=> 15S = 3I => Savings = 1/5

Hence Expenditure = 1-(1/5) = 4/5

Answer (D)__________________________________________________________

A simpler way which helped me solve the problem in 15 sec.

Analyze the ans needs to be in the form = Expenditure / IncomeHence

[3 times the numerator of the answer choices = 12 times the difference (Numerator - Denominator)]So ..

(A) 1/2 => 3 x (1) = 12 x (2-1) ... Incorrect

(B) 2/3 => 3 x (2) = 12 x (3-2) ... Incorrect

(C) 1/4 => 3 x (1) = 12 x (4-1) ... Incorrect

(D) 4/5 => 3 x (4) = 12 x (5-4) ... Correct(E) 5/6 => 3 x (5) = 12 x (6-5) ... Incorrect

Hope the post helped

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Good luck

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"If this post helps you on your GMAT journey, drop a +1 Kudo "

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