I always return to circles when converting between radians and degrees. Full circles have an interior angle measurement of 2π radians and 360º.
In this particular problem, we're given 5 radians. Now, we must determine the correct conversion factor to get the answer we want. To result in degrees as our unit, we need to "multiply" by degrees and "divide" out the radians, resulting in the following expression:
5 radians * (360º / 2π radians) = 5 radians * (360º / 2π radians) = 286.48º
