-44.93% is the change from 819 to 451
Calculation steps:
[( 451 - 819 ) ÷ 819] x 100 = -44.93%
Formula
Percentage change = [(451 - 819) / 819] x 100
Subtract the new number by the original number
451 - 819 = -368
-368 ÷ 819 = -0.44932844932844934
-0.44932844932844934 x 100 = -44.93%