-34.8% is the change from 819 to 534
Calculation steps:
[( 534 - 819 ) ÷ 819] x 100 = -34.8%
Formula
Percentage change = [(534 - 819) / 819] x 100
Subtract the new number by the original number
534 - 819 = -285
-285 ÷ 819 = -0.34798534798534797
-0.34798534798534797 x 100 = -34.8%