403.7% is the change from 81 to 408
Calculation steps:
[( 408 - 81 ) ÷ 81] x 100 = 403.7%
Formula
Percentage change = [(408 - 81) / 81] x 100
Subtract the new number by the original number
408 - 81 = 327
327 ÷ 81 = 4.037037037037037
4.037037037037037 x 100 = 403.7%