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

Answer 1

the bag decreased one third, so its weight decreases the same, so:
3/4pound - 3/4 pound*1/3
=3/4pound - 1/4 pound
=2/4 pound
=1/2 pound