A man gains 20% by selling an article for a certain price.

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A man gains 20% by selling an article for a certain price. If he sells it at double the price, the percentage of profit will be

Let the cost price of article be Rs. 100.
∴ First S.P. = Rs. 120
When the selling price be Rs. 240,
Profit = Rs. (240 – 100) = Rs. 140

∴ Profit percent =	Profit	× 100
	Cost price of article

Profit percent =	140	× 100 = 140%
	100