Question : By selling 35 articles, a shopkeeper gains the selling price of 15 articles. Find his gain percentage.

Option 1: 88%

Option 2: 40%

Option 3: 75%

Option 4: 60%

Question : By selling 100 notebooks, a shopkeeper gains the selling price of 20 notebooks. What is his gain percentage?

Option 1: 62.4%

Option 2: 22.5%

Option 3: 50.4%

Option 4: 25%

Question : 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:

Option 1: 40%

Option 2: 100%

Option 3: 120%

Option 4: 140%