Question

two-thirds of the girls in our class have brown eyes and one-fourth have blue eyes. What fraction of the girls has neither brown nor blue eyes? Show your work

Answer 1

1. Find a common denominator

1/4 2/3 both have 12 in common
1/4=3/12
2/3=8/12

2. Add both
3/12+8/12=11/12

3. Subtract

12/12-11/12=1/12

1/12 of the students have neither brown nor blue eyes

I hope I helped! :D