-32.84% is the change from 819 to 550
Calculation steps:
[( 550 - 819 ) ÷ 819] x 100 = -32.84%
Formula
Percentage change = [(550 - 819) / 819] x 100
Subtract the new number by the original number
550 - 819 = -269
-269 ÷ 819 = -0.32844932844932845
-0.32844932844932845 x 100 = -32.84%