-8.19% is the change from 904 to 830
Calculation steps:
[( 830 - 904 ) ÷ 904] x 100 = -8.19%
Formula
Percentage change = [(830 - 904) / 904] x 100
Subtract the new number by the original number
830 - 904 = -74
-74 ÷ 904 = -0.08185840707964602
-0.08185840707964602 x 100 = -8.19%