-44.27% is the change from 820 to 457
Calculation steps:
[( 457 - 820 ) ÷ 820] x 100 = -44.27%
Formula
Percentage change = [(457 - 820) / 820] x 100
Subtract the new number by the original number
457 - 820 = -363
-363 ÷ 820 = -0.4426829268292683
-0.4426829268292683 x 100 = -44.27%