Convert them to equivalent fractions with a common denominator.
Example: Halfway between 1/3 and 1/2
1/3 and 1/2 can become 2/6 and 3/6. There's no whole number between 2 and 3, so keep going to 4/12 and 6/12. Halfway between 1/3 and 1/2 is 5/12
The fraction halfway between 2/5 and 9/10 is 13/20
One eighth
1/4
23/35
7/24
halfway
The fraction halfway between 2/5 and 9/10 is 13/20
7/8
If that's 0 and 12, halfway is 6/1 If that's 0 and 1/2, halfway is 1/4
3/2=1.5
3/4
9/4
One eighth
5/16
3/16
A quarter 1/4
1/4