"In classical music from Western culture, a fifth is the interval from the first to the last of five consecutive notes in a diatonic scale."[1] CDEFG -> CG is

"In classical music from Western culture, a fifth is the interval from the first to the last of five consecutive notes in a diatonic scale."[1] CDEFG -> CG is a fifth [1] http://en.wikipedia.org/wiki/Perfect_fifth http://en.wikipedia.org/wiki/Perfect_fifth