Use the Keep, Change, Flip method.
Keep the first fraction.
Change the division sign to a multiplication sign.
Flip the last fraction (reciprocal).
Example:
3/4 ÷ 1/2
Keep the 3/4.
Change the ÷ sign to ×.
Flip the 1/2 to 2/1.
New equation:
3/4 × 2/1 = 6/4 ⇒ 3/2
The answer for 3/4 ÷ 1/2 is 3/2.