An auto shop normally charges $30.00 for an oil change, but they gave a 10% discount during a promotion sale. if a customer had a coupon for an additional 5% off the original cost, what is the discounted cost of the oil change?

Respuesta :

$30.00x85%=$25.50

Because 10%+5%=15% discount, so 100%-15%=85%

So discounted cost of oil change is $25.50. Hope this helps.