If a worker earns $50 per hour in salary but the project is charged $75 per hour for each hour the individual works, then the overhead rate is

Overhead rate is calculated by dividing the overhead cost by the direct cost over a similar period of measurement. In our case, the basis is per hour. The overhead cost is the rough estimate of the cost made through the proper reference to the historical data for old establishments and projections for the new ones. This can be expressed as,
    overhead rate = (overhead cost / direct cost) x 100%

Substituting the known values,
   overhead rate = ($75 / $50) x 100%
   overhead rate = 150%

ANSWER: overhead rate = 150%