Question 70

The cost price of a camera is 90% of its selling price. The profit percentage is:

Solution

The cost price of a camera is 90% of its selling price.

cost price = 90% of selling price

$$cost\ price=\frac{90}{100}\times\ selling\ price$$

cost price : selling price = 9 : 10

So let's assume cost price = 9y and selling price = 10y.

Profit percentage = $$\frac{\left(10y-9y\right)}{9y}\times\ 100$$

= $$\frac{y}{9y}\times\ 100$$

= $$11\frac{1}{9}$$ %

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