125.5% is the change from 200 to 451
Calculation steps:
[( 451 - 200 ) ÷ 200] x 100 = 125.5%
Formula
Percentage change = [(451 - 200) / 200] x 100
Subtract the new number by the original number
451 - 200 = 251
251 ÷ 200 = 1.255
1.255 x 100 = 125.5%
Example