-13.53% is the change from 939 to 812
Calculation steps:
[( 812 - 939 ) ÷ 939] x 100 = -13.53%
Formula
Percentage change = [(812 - 939) / 939] x 100
Subtract the new number by the original number
812 - 939 = -127
-127 ÷ 939 = -0.13525026624068157
-0.13525026624068157 x 100 = -13.53%