Question

speedy king is having a 30%-off sale on their box springs and mattresses. A queen-size, back supporter mattress is priced at $325. what is the sale price of the mattress?

Answer 1

So since its 30% off, you can do 100%-30%=70%. 70% in decimal form is 0.7. Thus you can do 325 X 0.7 which gives you $227.50.
Hope it helps :)