-11.83% is the change from 921 to 812
Calculation steps:
[( 812 - 921 ) ÷ 921] x 100 = -11.83%
Formula
Percentage change = [(812 - 921) / 921] x 100
Subtract the new number by the original number
812 - 921 = -109
-109 ÷ 921 = -0.11834961997828447
-0.11834961997828447 x 100 = -11.83%