Question

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

Answer 1

Cost price is 90% of selling price

Let SP = x

CP = 90% of x = 90x/100 = 9x/10

SP is greater so profit

profit = sp - cp

= x - 9x/10

= (10x-9x) / 10 = x/10

Profit % = profit/cp * 100

= (x/10) / (9x/10) * 100

= x/9x * 100

= 100/9

= 11 1/9 % = 11.11 % profit