271.07% is the change from 121 to 449
Calculation steps:
[( 449 - 121 ) ÷ 121] x 100 = 271.07%
Formula
Percentage change = [(449 - 121) / 121] x 100
Subtract the new number by the original number
449 - 121 = 328
328 ÷ 121 = 2.7107438016528924
2.7107438016528924 x 100 = 271.07%