-9.79% is the change from 919 to 829
Calculation steps:
[( 829 - 919 ) ÷ 919] x 100 = -9.79%
Formula
Percentage change = [(829 - 919) / 919] x 100
Subtract the new number by the original number
829 - 919 = -90
-90 ÷ 919 = -0.09793253536452666
-0.09793253536452666 x 100 = -9.79%