-20.02% is the change from 819 to 655
Calculation steps:
[( 655 - 819 ) ÷ 819] x 100 = -20.02%
Formula
Percentage change = [(655 - 819) / 819] x 100
Subtract the new number by the original number
655 - 819 = -164
-164 ÷ 819 = -0.20024420024420025
-0.20024420024420025 x 100 = -20.02%