344.63% is the change from 121 to 538
Calculation steps:
[( 538 - 121 ) ÷ 121] x 100 = 344.63%
Formula
Percentage change = [(538 - 121) / 121] x 100
Subtract the new number by the original number
538 - 121 = 417
417 ÷ 121 = 3.446280991735537
3.446280991735537 x 100 = 344.63%