-45.43% is the change from 821 to 448
Calculation steps:
[( 448 - 821 ) ÷ 821] x 100 = -45.43%
Formula
Percentage change = [(448 - 821) / 821] x 100
Subtract the new number by the original number
448 - 821 = -373
-373 ÷ 821 = -0.4543239951278928
-0.4543239951278928 x 100 = -45.43%