347.93% is the change from 121 to 542
Calculation steps:
[( 542 - 121 ) ÷ 121] x 100 = 347.93%
Formula
Percentage change = [(542 - 121) / 121] x 100
Subtract the new number by the original number
542 - 121 = 421
421 ÷ 121 = 3.479338842975207
3.479338842975207 x 100 = 347.93%