Liana and Doug shared 21 cookies. Liana are 2/7 of the cookies. Doug ate 1/3 of the cookies. How many cookies did liana eat? How many cookies did Doug eat?

Question

Liana and Doug shared 21 cookies. Liana ate 2/7 of the cookies. Doug ate 1/3 of the cookies. How many cookies did liana eat? How many cookies did Doug eat? And how many cookies were left. Show all your work and all answers must be justified

Answer 1

2/7 x 21 =

2/7 x 21/1 =

 2/1 * 3/1  <--- 7 cancels 21

   = 6

 

 

1/3 x 21 = 21/3 = 7

 

Liana ate 6, Doug ate 7

 

8 cookies remain