-32.97% is the change from 819 to 549
Calculation steps:
[( 549 - 819 ) ÷ 819] x 100 = -32.97%
Formula
Percentage change = [(549 - 819) / 819] x 100
Subtract the new number by the original number
549 - 819 = -270
-270 ÷ 819 = -0.32967032967032966
-0.32967032967032966 x 100 = -32.97%