Question : The ratio of the selling price to the cost price of a computer is 7 : 5. What is the profit percentage?
Option 1: 60%
Option 2: 10%
Option 3: 40%
Option 4: 20%
Correct Answer: 40%
Solution :
Given,
The ratio of selling price to cost piece = 7 : 5
We know, Profit percentage = $\frac{\text{Profit}}{\text{cost price}} × 100$
Let the selling price and cost price be $7x$ and $5x$ respectively
Profit = $7x - 5x$
⇒ Profit = $2x$
So, the profit percentage $=\frac{2x}{5x} × 100= 40$%
Hence, the correct answer is 40%.
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