-48.97% is the change from 823 to 420
Calculation steps:
[( 420 - 823 ) ÷ 823] x 100 = -48.97%
Formula
Percentage change = [(420 - 823) / 823] x 100
Subtract the new number by the original number
420 - 823 = -403
-403 ÷ 823 = -0.4896719319562576
-0.4896719319562576 x 100 = -48.97%