Question

The cost price of an article is 90% of its selling price. What is the profit or the loss as percent ?

Answer 1

Let S.P. of the article = Rs.100
$\therefore$ C.P. of the article = $\frac{90}{100}\times 100$
= Rs. 90
Gain = Rs. 100 - Rs. 90 = Rs. 10
Gain% = $\frac{Gain}{C.P.}\times 100$
= $\frac{10}{90}\times 100=\frac{100}{9}$%