-12.85% is the change from 942 to 821
Calculation steps:
[( 821 - 942 ) ÷ 942] x 100 = -12.85%
Formula
Percentage change = [(821 - 942) / 942] x 100
Subtract the new number by the original number
821 - 942 = -121
-121 ÷ 942 = -0.12845010615711253
-0.12845010615711253 x 100 = -12.85%