257.5% is the change from 120 to 429
Calculation steps:
[( 429 - 120 ) ÷ 120] x 100 = 257.5%
Formula
Percentage change = [(429 - 120) / 120] x 100
Subtract the new number by the original number
429 - 120 = 309
309 ÷ 120 = 2.575
2.575 x 100 = 257.5%
Example