After selling 140 apples a fruit seller earns a profit equal to S.P. of 20 apples. His profit percentage is:

16.70% 17.70% 18.00% 20.00%

16.70%

Profit = Selling price - Cost price SP140 - CP140 = SP20 SP140 - SP20 = CP140 SP120 = CP140 \(\frac{SP }{CP }\) = \(\frac{140 }{120}\) \(\frac{SP }{CP }\) = \(\frac{7 }{6}\) Profit% = \(\frac{1 }{6}\) x 100 = 16.66%