With this example, we'll break it into 2 fractions, both with denominator 4q to make it easier to see what to do.

`(6p^3q^2-10p^2q)/(4q)=(6p^3q^2)/(4q)-(10p^2q)/(4q)`

Next, we cancel the numbers and variables:

`(3p^3q)/2-(5p^2)/2`

Finally, we combine the fractions:

`(3p^3q-5p^2)/2`

After you have had some practice with these, you'll be able to do it without separating them into 2 fractions first.