(Part A) At basketball practice, Derrick tossed a basketball from the free-throw line to the basket 80 times. Of his 80 attempts, he made 66 baskets, What percent of throws did Derrick make? (Part B) At practice the next day, Derrick made 54 baskets out of 70 attempts. Describe how Derrick's overall percentage for the two days compares to his percentage for the previous day. Justify your answer.