-11.82% is the change from 931 to 821
Calculation steps:
[( 821 - 931 ) ÷ 931] x 100 = -11.82%
Formula
Percentage change = [(821 - 931) / 931] x 100
Subtract the new number by the original number
821 - 931 = -110
-110 ÷ 931 = -0.11815252416756176
-0.11815252416756176 x 100 = -11.82%