249.59% is the change from 123 to 430
Calculation steps:
[( 430 - 123 ) ÷ 123] x 100 = 249.59%
Formula
Percentage change = [(430 - 123) / 123] x 100
Subtract the new number by the original number
430 - 123 = 307
307 ÷ 123 = 2.4959349593495936
2.4959349593495936 x 100 = 249.59%