Question

When dividing fractions and it is most helpful to change a mixed number into a

Answer 1

An improper fraction.  This means that all of the number, for example 3 3/7, is in one fraction, which in this case would be 24/7.  This makes it easier to see what the number is equal to.
Hope this helps!

Answer 2

It's most helpful to change a mixed number into a normal fraction.

Hopefully this could be of assistance. :)