Question

What part of a revolution have you turned through if you stand facing:

West and turn clockwise to face east?

Answer 1

In order to face towards the east after turning clockwise from facing towards the west, one must turn $\frac{2}{4}$th or $\frac{1}{2}$ of a full revolution.

A full revolution, in this case, will be four ${90}^{\circ }$ rotations in the clockwise direction.

One ${90}^{\circ }$ rotation will be towards north and another will be towards the east.

Hence, required turn is half of the revolution.