-9.76% is the change from 912 to 823
Calculation steps:
[( 823 - 912 ) ÷ 912] x 100 = -9.76%
Formula
Percentage change = [(823 - 912) / 912] x 100
Subtract the new number by the original number
823 - 912 = -89
-89 ÷ 912 = -0.09758771929824561
-0.09758771929824561 x 100 = -9.76%