Question 431842
Suppose we have an A Major chord and an a minor chord. Since both A's are assumed to be 440 Hz, then we can compute all the other frequencies, using ratios:


A M -- 440 550 660
a m -- 440 528 660


The ratio is 550/528 = 25/24. We have a ratio, so instead of the frequency ratio in cycles per second, it is in fact unitless.