100% is the change from 455 to 910
Calculation steps:
[( 910 - 455 ) ÷ 455] x 100 = 100%
Formula
Percentage change = [(910 - 455) / 455] x 100
Subtract the new number by the original number
910 - 455 = 455
455 ÷ 455 = 1
1 x 100 = 100%
Example