1) A $12 calculator has a discount of 25%. What is the sale price?

2) You tip your waiter 32% on a $45 bill. What is the total amount you pay?

3) To rent a car, there is a 15% daily tax. If the daily rental fee is $30, how much is the tax for 4 days?

4)For a food deliver, you tip 18% on a $55.00 bill. How much is the tip?