461.73% is the change from 81 to 455
Calculation steps:
[( 455 - 81 ) ÷ 81] x 100 = 461.73%
Formula
Percentage change = [(455 - 81) / 81] x 100
Subtract the new number by the original number
455 - 81 = 374
374 ÷ 81 = 4.617283950617284
4.617283950617284 x 100 = 461.73%