-47.71% is the change from 939 to 491
Calculation steps:
[( 491 - 939 ) ÷ 939] x 100 = -47.71%
Formula
Percentage change = [(491 - 939) / 939] x 100
Subtract the new number by the original number
491 - 939 = -448
-448 ÷ 939 = -0.47710330138445156
-0.47710330138445156 x 100 = -47.71%