-61.05% is the change from 819 to 319
Calculation steps:
[( 319 - 819 ) ÷ 819] x 100 = -61.05%
Formula
Percentage change = [(319 - 819) / 819] x 100
Subtract the new number by the original number
319 - 819 = -500
-500 ÷ 819 = -0.6105006105006106
-0.6105006105006106 x 100 = -61.05%