A dishonest shopkeeper promises to sell his goods at its cost price but he uses 17% less weight. The profit percent is:

23\(\frac{40}{83}\)% 20\(\frac{40}{83}\)% 20% 26%

20\(\frac{40}{83}\)%

Let the price of 1000 gm. = Rs. 100 but he uses 830 gm. instead of 1000 gm. (1000 × 83% = 830 gm.) C.P. of 830 gm. = Rs. 83 S.P. of 830 gm. = Rs. 100 Profit = \(\frac{(100 - 83)}{83}\) × 100 = \(\frac{1700}{83}\) = 20\(\frac{40}{83}\)%