There are 60 cookies in a box. The number of raisin cookies was 1/3 the number of plain cookies. Chantalle ate an equal number of raisin and plain cookies. Findthe difference between the number of raisin and plain cookies in the end.
+591 1/3 of plain cookies + plain cookies = 4 parts. 60/4=15
there are 15 raisin, and 45 plain. Lets say chantalle ate x cookies, for all 0
That means there are 15-x raisin left, and 45-x plain left.
(45-x)-(15-x)=45-x-15+x=30. No matter the amount chantalle eats, the difference will always be $\boxed{30}$
