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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.

 Apr 21, 2021
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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 $\boxed{30}$ 

 Apr 22, 2021

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