A bookstore was selling books for 50% off. A shelf in the store had a sign that said "Books on this

A bookstore was selling books for 50% off. A shelf in the store had a sign that said "Books on this shelf take an additional 25% off."

Leta picked out books from the discount shelf that had a regular price of $100. How much did Leta pay for the discounted books?

100 with 50% discount is $40

$50 with a 25% discount is $12.50 off
$50 - $12.50 = $37.50