No common denominator is needed with multiplication of fractions. Just times across and cancel terms where you can.
I am good at mathematics. However, since I stop studying pure math for about a year now, I am having trouble with a simple process to solve fraction questions. How do you get a common denominator in the following equation
((4x/5xy)(15y/16x^2))
The answer is 3/4x^2 however, I cannot remember the steps needed to solve this question. It is starting to annoy me.