molly ate one-third of bags of chips on friday. on saturday, she ate one-half of what was left in the bag. how much of the whole bag did she eat on saturday

If Molly ate 1/3 of the bag of chips on Friday, that means that there is 2/3 of the bag left. Then, she eats 1/2 of what is left in the bag (2/3).  (We multiply these fractions to find the answer.) 1/2 * 2/3 = 1/3. Therefore, Molly at 1/3 of the entire bag on Saturday.