-20.15% is the change from 819 to 654
Calculation steps:
[( 654 - 819 ) ÷ 819] x 100 = -20.15%
Formula
Percentage change = [(654 - 819) / 819] x 100
Subtract the new number by the original number
654 - 819 = -165
-165 ÷ 819 = -0.20146520146520147
-0.20146520146520147 x 100 = -20.15%