Here is the problem:

Alex wants to sew bears. Each bear needs 1 and 2/3 yd fabric. She has 7 yd.How many can she make.

How I did it: 1 x 3 + 2 = 5/3

7/1 x 3/5 = 21/5

= 4 and 1/5

4 bears and 1/5 yard left.

The book says the correct answ. is 4 bears and 1/3 yard... how the heck do they get 1/3 and not 1/5?