-41.64% is the change from 819 to 478
Calculation steps:
[( 478 - 819 ) ÷ 819] x 100 = -41.64%
Formula
Percentage change = [(478 - 819) / 819] x 100
Subtract the new number by the original number
478 - 819 = -341
-341 ÷ 819 = -0.4163614163614164
-0.4163614163614164 x 100 = -41.64%