The same price of every item in a store is 85% of it usual price. ( please explain your answer because I don’t understand how to solve this)

The usual price of a backpack is $30, what is its sale price?

Respuesta :

85% is 0.85 decimals
85 percent of 30
30 * 0.85 = 25.50
30-25.50 = 4.50
Solution: after sale, it is $4.50