We write a triplet by adding a number three above or below the notes that it applies to. Sometimes you'll see a bracket over the notes as shown below. This just is showing which notes are in the triplet. You might also see it written with a curved line that looks like a slur instead of a bracket.
What does a 3 over notes mean?
A triplet is identified by a small " 3" above or below its note beam, bracket, or slur. A triplet group's total duration is equal to two of the original note-values contained within.
How many beats is a triplet?
Definition of the triplet
A triplet is a tuplet that permit to divide the beat (or more than 1 beat) by 3 in simple meters. The rule is: A triplet can put 3 music notes in the equivalent of 2. Or more exactly, A triplet can put 3 notes of equal length in the equivalent of the duration of 2 notes of equal length.