-9.89% is the change from 920 to 829
Calculation steps:
[( 829 - 920 ) ÷ 920] x 100 = -9.89%
Formula
Percentage change = [(829 - 920) / 920] x 100
Subtract the new number by the original number
829 - 920 = -91
-91 ÷ 920 = -0.09891304347826087
-0.09891304347826087 x 100 = -9.89%