123.04% is the change from 204 to 455
Calculation steps:
[( 455 - 204 ) ÷ 204] x 100 = 123.04%
Formula
Percentage change = [(455 - 204) / 204] x 100
Subtract the new number by the original number
455 - 204 = 251
251 ÷ 204 = 1.2303921568627452
1.2303921568627452 x 100 = 123.04%