4028.57% is the change from 21 to 867
Calculation steps:
[( 867 - 21 ) ÷ 21] x 100 = 4028.57%
Formula
Percentage change = [(867 - 21) / 21] x 100
Subtract the new number by the original number
867 - 21 = 846
846 ÷ 21 = 40.285714285714285
40.285714285714285 x 100 = 4028.57%