Question from JOHN:
IF YOU HAD A RATE OF 678/HOUR AND YOUR NEW RATE/HOUR
IS NOW 1961 WHAT IS PERCENT OF IMPROVEMENT
Percent change is the change as a percentage of the starting value. The change in your case is
1961 - 678 = 1283 dollars/hour. 1283 as a percentage of 678 is 1283/678 × 100 = 186.75%.