Answer :

well, to answer this, you have to find the least common multiple.
In this case, it is 24

then you make it

16/26 and 21/24

In this case, 7/8 or  21/24 is larger
so first convert the bottom numbers to the same number to compare

3 times 8=24
8 times 3=24

so
2/3 times 1 or 8/8=16/24
7/8 times 1 or 3/3=21/24

we see that 16 is less than 21 so

2/3 is less than 7/8