1 complete turn = 360 degrees. Fraction of a turn: multiply the fraction by 360. For a mixed number, convert to improper fraction first.

1 complete turn	=	360 degrees
\(1\dfrac{1}{2}\) turns	=	\(1\dfrac{1}{2} \times 360 = \dfrac{3}{2} \times 360 = 360 \div 2 \times 3 = 180 \times 3 = 540\) degrees