250.41% is the change from 121 to 424
Calculation steps:
[( 424 - 121 ) ÷ 121] x 100 = 250.41%
Formula
Percentage change = [(424 - 121) / 121] x 100
Subtract the new number by the original number
424 - 121 = 303
303 ÷ 121 = 2.5041322314049586
2.5041322314049586 x 100 = 250.41%