-8.9% is the change from 910 to 829
Calculation steps:
[( 829 - 910 ) ÷ 910] x 100 = -8.9%
Formula
Percentage change = [(829 - 910) / 910] x 100
Subtract the new number by the original number
829 - 910 = -81
-81 ÷ 910 = -0.08901098901098901
-0.08901098901098901 x 100 = -8.9%