A man earns a profit of 20 percent by selling a calculator for a certain price. If he sells that calculator at double the price, then what will be the profit percentage ?

140 percent

Let the CP of the calculator = 100

Then, the selling price of the calculator = 120

According to the given condition,

if he sells the calculator at 120 × 2 = 240

then the profit will be = 240 - 100 = 140

Profit % = \(\frac{140 × 100}{100}\) = 140%