Question

The cost price of 20 articles is same as the selling price of 16 articles. Find the gain percent.

Answer 1

C.P. of 20 articles = S.P. of 16 articles.
Let C.P. of 1 article = Re. 1
$\therefore$ C.P. of 20 articles = Rs.20
and C.P. of 16 articles = Rs.16
S.P. of 16 articles = Rs. 20
[S.P. of 16 articles = C.P. of 20 articles]
Gain = Rs. 20- Rs. 16 = Rs. 4
Gain% = $\frac{4}{16}\times 100$
= $\frac{4\times 100}{16}$
= 25%