The ratio value of 12 to 15 is greater than or less than the ratio value of 7 to 5?

The answer is less than

Explanation:

First you need to make each ratio a fraction. Multiply the 5 by 3 to get the same denominator as 12/15 and do the same to the 7. Now you should have 12/15 and 21/15. 21/15 is greater than 12/15

c, d, e, f, g, a, b, and c.

sometimes western music will also use solfege. the names of these are do ra me fa sol la si (or ti) and do.

to indicate a note a half step higher or lower then the original note, you would say c # (for a half a step above c) or bb (for half a step below b)