If the ratio of cost price and selling price of an article

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If the ratio of cost price and selling price of an article is 4 : 5, then the percentage of profit will be

1. 20
2. 0.1
3. 10
4. 25

Correct Option: D

Let the C.P. be Rs. 4x.
Its S.P. = Rs. 5x.
Profit = Rs. (5x – 4x) = Rs. x.

∴ Profit per cent =	x	× 100
	4x

= 25%