30.6% is the change from 415 to 542
Calculation steps:
[( 542 - 415 ) ÷ 415] x 100 = 30.6%
Formula
Percentage change = [(542 - 415) / 415] x 100
Subtract the new number by the original number
542 - 415 = 127
127 ÷ 415 = 0.3060240963855422
0.3060240963855422 x 100 = 30.6%