-33.46% is the change from 819 to 545
Calculation steps:
[( 545 - 819 ) ÷ 819] x 100 = -33.46%
Formula
Percentage change = [(545 - 819) / 819] x 100
Subtract the new number by the original number
545 - 819 = -274
-274 ÷ 819 = -0.33455433455433453
-0.33455433455433453 x 100 = -33.46%