3919.05% is the change from 21 to 844
Calculation steps:
[( 844 - 21 ) ÷ 21] x 100 = 3919.05%
Formula
Percentage change = [(844 - 21) / 21] x 100
Subtract the new number by the original number
844 - 21 = 823
823 ÷ 21 = 39.19047619047619
39.19047619047619 x 100 = 3919.05%