-9.6% is the change from 917 to 829
Calculation steps:
[( 829 - 917 ) ÷ 917] x 100 = -9.6%
Formula
Percentage change = [(829 - 917) / 917] x 100
Subtract the new number by the original number
829 - 917 = -88
-88 ÷ 917 = -0.09596510359869138
-0.09596510359869138 x 100 = -9.6%