The bottom number shows which type of is counted for 1 beat.

Answer 1

The bottom number in music notation represents the type of note that is counted for one beat. It indicates the time signature of a musical piece and determines the value or duration of each beat. For example, if the bottom number is 4, it means that a quarter note (or a note that lasts for one-fourth of a whole note) is counted for one beat. Similarly, if the bottom number is 8, an eighth note (or a note that lasts for one-eighth of a whole note) is counted for one beat.