Gail spent 3/10 of her day at school, and 3/9 of her day sleeping. About how much of her day is left?

Question

A:about 7/10 B:about 1/3
C:about 1/5 D:about 4/10

My answer: I am stuck choosing between 4/10 or 1/3.

Answer 1

3/10+3/9=27/20+30/90=57/90
so 33/90 is left, which is about 1/3

Answer 2

THANK YOU SOOOOOOOOOOOOOOOOOOOOOOOOOO MUCH!!!!!!!!!!!!!!!!!

Answer 3

How is 33/90 left?

Answer 4

How do you get 33/90?

Answer 5

(90/90) - (57/90) = 33/90