-9.67% is the change from 920 to 831
Calculation steps:
[( 831 - 920 ) ÷ 920] x 100 = -9.67%
Formula
Percentage change = [(831 - 920) / 920] x 100
Subtract the new number by the original number
831 - 920 = -89
-89 ÷ 920 = -0.0967391304347826
-0.0967391304347826 x 100 = -9.67%