-23.81% is the change from 819 to 624
Calculation steps:
[( 624 - 819 ) ÷ 819] x 100 = -23.81%
Formula
Percentage change = [(624 - 819) / 819] x 100
Subtract the new number by the original number
624 - 819 = -195
-195 ÷ 819 = -0.23809523809523808
-0.23809523809523808 x 100 = -23.81%