If the cost price is 80% of the selling price,what is the profit per cent?

If the cost price is 95% of the selling price, what is the profit per cent?

If the cost price is 96% of the selling price, then what is the profit percent?

If the cost price of an article is 50% of the selling price, then what is the profit percent?

The marked price of an article is 20% more than its cost price . If 5% discount is given on the marked price , what is the profit per cent ?