If the original price of an item was $30.00 and Joan only paid $24.00 for it, what percentage discou

If the original price of an item was $30.00 and Joan only paid $24.00 for it, what percentage discount did Joan receive on her purchase?

She received 6 dollars off of a 30 dollar purchase, so we have 6/30 = 1/5 = 0.2 = 20%