Question

Mallory ate 3 cookies leaving 15 cookies in the jar what is the ratio number of cookies Mallory ate

Answer 1

1/6

1) Since a ratio expresses a relationship between two parts

We can write this about Mallory and the ratio of the cookies she ate. And, as She ate 3 and there are 15 left, so initially there were 18 cookies.

18-3=15

2) So let's consider that, to write our ratio:

$\frac{3}{18}=\frac{1}{6}$

3) So Mallory ate 1/6 of the cookies in the jar.