A bearing describes direction using an angle. It is always measured from North, going clockwise, and written with three figures.

A North line is the starting line for every bearing, and clockwise means the same direction as the hands of a clock. So $7^{\circ }$ becomes $007^{\circ }$, $42^{\circ }$ becomes $042^{\circ }$, and $115^{\circ }$ stays $115^{\circ }$.

When you read "the bearing of B from A", the word from tells you where to start. You measure the angle at A, not at B.