346.28% is the change from 121 to 540
Calculation steps:
[( 540 - 121 ) ÷ 121] x 100 = 346.28%
Formula
Percentage change = [(540 - 121) / 121] x 100
Subtract the new number by the original number
540 - 121 = 419
419 ÷ 121 = 3.4628099173553717
3.4628099173553717 x 100 = 346.28%