304.96% is the change from 121 to 490
Calculation steps:
[( 490 - 121 ) ÷ 121] x 100 = 304.96%
Formula
Percentage change = [(490 - 121) / 121] x 100
Subtract the new number by the original number
490 - 121 = 369
369 ÷ 121 = 3.049586776859504
3.049586776859504 x 100 = 304.96%