Use a model to divide. 1/3 : 4

1 1/3

3/4

12

1 / 12

1/12

Convert them both to have the same denominator.

1/3 : 4

1/3 : 12/3

When dividing fractions, you flip the second fraction and multiply instead.

1/3 : 12/3 = 1/3 * 3/12

1 * 3 = 3

3 * 12 = 36

3/36

This can be simplified by dividing by 3.

3/36 = 1/12