3823.81% is the change from 21 to 824
Calculation steps:
[( 824 - 21 ) ÷ 21] x 100 = 3823.81%
Formula
Percentage change = [(824 - 21) / 21] x 100
Subtract the new number by the original number
824 - 21 = 803
803 ÷ 21 = 38.23809523809524
38.23809523809524 x 100 = 3823.81%