In a bag, there are 400 marbles. 60 are white, 120 are blue, and the remainder are red. If 20 red marbles are removed, what fraction of the remaining marbles in the bag are not white?

2 answers

not white: 400-60 = 340
so, after removing 20 reds,
340/(400-20) = 340/380 = 17/19 not white
At the school store, pencils cost $.0.18 and erasers are 6 cents. How much change would you get from a $5 bill if you purchased 7 pencils and 7 erasers?