99.78% is the change from 455 to 909
Calculation steps:
[( 909 - 455 ) ÷ 455] x 100 = 99.78%
Formula
Percentage change = [(909 - 455) / 455] x 100
Subtract the new number by the original number
909 - 455 = 454
454 ÷ 455 = 0.9978021978021978
0.9978021978021978 x 100 = 99.78%