Erin buys a bag of peanuts that weighs 3/4 of a pound. Later that week, the bag is 2/3 full. How much does the bag of peanuts weigh now?

2 / 3 ∙ 3 / 4 = 2 ∙ 3 / 3 ∙ 4 = 6 / 12 = 6 ∙ 1 / 6 ∙ 2 = 1 / 2 pound