The original price of a scarf was begun math size 18px style $ 16 end style. During a store-closing sale, a shopper saved begin math size 18px style $ 12 end style on the scarf. What percent discount did she receive? 

HINT: 12 is what percent of 16? A begin math size 18px style 25 percent sign end style B begin math size 18px style 50 percent sign end style C begin math size 18px style 75 percent sign end style