-4.87% is the change from 863 to 821
Calculation steps:
[( 821 - 863 ) ÷ 863] x 100 = -4.87%
Formula
Percentage change = [(821 - 863) / 863] x 100
Subtract the new number by the original number
821 - 863 = -42
-42 ÷ 863 = -0.04866743916570104
-0.04866743916570104 x 100 = -4.87%