Question

Find the profit per cent or loss per cent made in each of the following cases, when by selling $20$ identical articles, a shopkeeper gains equal to C.P. of $5$ articles.

Answer 1

Lets C.P is of one article Rs. $1$
Then C,P of $20$ articles is R.s $20$
C.P of $5$ articles is Rs. $5$
According to Question, gain Rs. $5$
Profit $\%$ $=\frac{5}{20}\times 100=25$ $\%$