Which is longer 3/8 or 3/6?

3/6 because the smaller the denominator the bigger the fraction.

Easy, find a common denominator, for

3/8

and

3/6

8: 8,16,24,

6:6,12,18,24

then take,

3/8*3 3*3=9 8*3=24

=9/24

then,

3/6*4 3*4=12 6*4=24

=12/24

Set them equal to each other, 3/24=12/24, which one is larger?

12/24, which is 3/6.

Thus, your answer, is 3/6 is longer.