127.5% is the change from 200 to 455
Calculation steps:
[( 455 - 200 ) ÷ 200] x 100 = 127.5%
Formula
Percentage change = [(455 - 200) / 200] x 100
Subtract the new number by the original number
455 - 200 = 255
255 ÷ 200 = 1.275
1.275 x 100 = 127.5%
Example