Blake snacked on a bag of chips while watching a movie, After the movie 7/8 of the bag remained uneaten. His dog got into the bag later and ate 3/5 of the remaining chips which expression can be used to find the fraction of the original whole bag of chips that Blake's dog ate? A 3/5 - 7/8
B 3/5 x 7/8
C 3/5 + 7/8
D 3/5 ÷ 7/8