I need help on a formula for this simple program.

I need help on a formula for this simple program.

I/P: the original price of an item (float or double) and the % off (discount)
O/P: sticker price (price you will pay before taxes)

Basically, this program needs to calculate the price of an item after discount.

I can do this on a calculator, but it's hard for me to figure out how to write the formula for this program.

I also need help on showing the $ on the user screen.

Thanks!

price = cost - (cost * discount);