No you do not.
no u dnt need to have a common denominator.. Just multiply both the denominator and numerator of the fractions u are working on and u will arrive at the answers
Common denominators are found by multiplying one denominator with another. Since you only have one here, you need another.
only when adding and subtracting
You can always find a common denominator by multiplying the denominators together.
Note: numerator is the top part of the fraction, denominator is the bottom part. 1) Find a common denominator. It may be the least common denominator, but it need not be; just multiplying the denominators also gives you a common denominator, not necessarily the smallest one. 2) Convert each fraction so that it has this common denominator. This means multiplying numerator and denominator by the same number.
The common denominator for a set of numbers is identified by simply multiplying the numbers together. This will not be the least common denominator, but that is not what the question is about.
When you're dividing fractions ... or multiplying thrm ... they don't need to have the same denominator.