4009.52% is the change from 21 to 863
Calculation steps:
[( 863 - 21 ) ÷ 21] x 100 = 4009.52%
Formula
Percentage change = [(863 - 21) / 21] x 100
Subtract the new number by the original number
863 - 21 = 842
842 ÷ 21 = 40.095238095238095
40.095238095238095 x 100 = 4009.52%