If I have two different percentages and I wanted to know the change, I would simply use the percentage change formula...but what if I want to compare two percentages that have different amounts: Ex: August - there was 539 right answers out of 743 = 72.5 % September - there was 498 answers out of 820 = 60.7%
How can I do a monthly comparison of change between those 2 percentages?
It was suggested to me that I use LCD, but those numbers could be massive if I have a larger set of numbers like in the thousands.
So, should I analyze the months separately or what should I do?
**I want to do a comparative analysis on the students who took the exam in august vs the students in september. LCD = lowest common denominator. Can this be done?