-9.87% is the change from 922 to 831
Calculation steps:
[( 831 - 922 ) ÷ 922] x 100 = -9.87%
Formula
Percentage change = [(831 - 922) / 922] x 100
Subtract the new number by the original number
831 - 922 = -91
-91 ÷ 922 = -0.09869848156182212
-0.09869848156182212 x 100 = -9.87%