It is a measure of a part of a full turn.
It is one whole turn.
1/360
1 degree is 1/360 of a full turn
One-sixth
Since a full turn is 360 degrees, 270 degrees is 270/360 of a full turn.
It is degrees that are fraction
Since a full turn is 360°, 1° would be equal to 1/360 of a full turn.
1/2
1/360
1/360.
1 full turn
the fraction would be 18 over 100