-41.51% is the change from 819 to 479
Calculation steps:
[( 479 - 819 ) ÷ 819] x 100 = -41.51%
Formula
Percentage change = [(479 - 819) / 819] x 100
Subtract the new number by the original number
479 - 819 = -340
-340 ÷ 819 = -0.41514041514041516
-0.41514041514041516 x 100 = -41.51%