21 articles were bought for 6531 and sold for Rs.9954. How much was the approximate profit percentage per article?
C.P. of 1 article = $$\frac{6531}{21}$$ = Rs. 311
S.P. of 1 article = $$\frac{9954}{21}$$ = Rs. 474
=> Profit on 1 article = S.P. - C.P. = 474 - 311
= Rs. 163
$$\therefore$$ Profit % = $$\frac{163}{311} * 100$$
= 52.4% $$\approx$$ 52%
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