3423.81% is the change from 21 to 740
Calculation steps:
[( 740 - 21 ) ÷ 21] x 100 = 3423.81%
Formula
Percentage change = [(740 - 21) / 21] x 100
Subtract the new number by the original number
740 - 21 = 719
719 ÷ 21 = 34.23809523809524
34.23809523809524 x 100 = 3423.81%