Susan has 50% more books than michael. michael has 40 more books. if michael buys 8 more books, will susan have more or less than michael? what percent more or less will susan books be

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.