Well she wants to make a dozen towels. a dozen is 12 so she wants 12 towels. each towel is 3/4 yards. so we can add 3/4 12 times like 3/4 + 3/4 + 3/4 and so on. or we can do 12 * 3/4
we can rewrite 12 as 12/1. like this 12/1 * 3/4
to multiply fractions we multiply the tops and get 12 * 3 = 36