Question
Monthly income of P is Rs.20000 and his monthly savings
is Rs.12000. If his monthly income is decreased by 40% and monthly expenditure is decreased by 30% then find the approximate percentage decrease in his monthly savings.Solution
Expenditure of P = Rs.(20000 – 12000) = Rs.8000 New Saving = (0.6 × 20000 - 0.7 × 8000) = 12000 - 5600 = Rs.6400 Decrease % in Saving = [(12000 - 6400)/12000] × 100 = 47%
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