A fruit seller uses a faulty balance that reads 900 grams as 1 kg. He sells apples at ₹150 per kg (as per faulty balance). If his purchase price is ₹120 per kg (actual weight), what is his actual profit percentage?
\(38\tfrac89\)%
For every 900 g actually given (charged as 1 kg at ₹150), the actual cost is \(120\times0.9 = 108\).
Profit: \(150-108 = 42\); profit percentage \(=\dfrac{42}{108}\times100 = 38\tfrac89\)%.
Hence, the fruit seller's actual profit percentage is \(38\tfrac89\)%.
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