255.37% is the change from 121 to 430
Calculation steps:
[( 430 - 121 ) ÷ 121] x 100 = 255.37%
Formula
Percentage change = [(430 - 121) / 121] x 100
Subtract the new number by the original number
430 - 121 = 309
309 ÷ 121 = 2.553719008264463
2.553719008264463 x 100 = 255.37%