AMC 12 2006b Problem 4

Mary is about to pay for five items at the grocery store. The prices of the items are $7.99$, $4.99$, $2.99$, $1.99$, and $0.99$. Mary will pay with a twenty-dollar bill. Which of the following is closest to the percentage of the $20.00$ that she will receive in change? $\text {(A) } 5 \text {(B) } 10 \text {(C) } 15 \text {(D) } 20 \text {(E) } 25$