word problems with fractions

Question

Jack bought a 16n pound bag of dog food, his dog ate 2/3 of the bag in a month, how many pounds of food did the dog eat that month?

Answer 1

2/3 of a bag is 2/3 of 16 pounds=(2/3)*16=32/3 pounds=10 2/3 pounds or 10.67 pounds, or 10 pounds 11 ounces approx (10 pounds 10.67 ounces more accurately). If the bag contained 16n pounds of food, as the question reads, then the dog consumed 10.67n pounds. The word "of" usually means multiply in word problems.