How many \(\frac{1}{3}\) pound paperback books together weigh 25 pounds?
Explanation
If each book weighs \(\frac{1}{3}\)pound, then 1 pound = 3 books. We can set up a proportion to solve: 1 pound / 3 books = 25 pounds / x books. Now cross-multiply:
(1)(x) = (3)(25)
x = 75