One-fifth of the cost price and one-sixth of the selling price are equal. Find the profit or loss percentage.

If the cost price of 6 pens is equal to the selling price of 4 pens,find the profit or loss percent.

If the cost price of 15 articles is equal to the selling price of 20 articles,find the profit or loss percentage

If the cost price of five apples is equal to the selling price of 3 apples then find the profit percentage .

The cost price of an article is 90% of its selling price. What is the profit or the loss as percent?

In the cost price of 20 articles is equal to the selling price of 15 articles then find the profit or loss percentage.