Question
A shopkeeper earns a profit of 30% by selling an
article. What would be the approximate percent change in the profit percent, if he had paid 20% less and sold at 20% more?Solution
Original profit = 30% Let the original C.P = Rs. 100 ∴ S.P = Rs.130 Now, New C.P = Rs. 80 And New S.P = 120 % of 130 = Rs. 156 ∴ New Profit % = 76/80 × 100 = 95% ∴ % change in profit percent = (95-30)/30 × 100 = 65/30 × 100 = 216.66% approx.
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