-33.7% is the change from 819 to 543
Calculation steps:
[( 543 - 819 ) ÷ 819] x 100 = -33.7%
Formula
Percentage change = [(543 - 819) / 819] x 100
Subtract the new number by the original number
543 - 819 = -276
-276 ÷ 819 = -0.336996336996337
-0.336996336996337 x 100 = -33.7%