38.62% is the change from 391 to 542
Calculation steps:
[( 542 - 391 ) ÷ 391] x 100 = 38.62%
Formula
Percentage change = [(542 - 391) / 391] x 100
Subtract the new number by the original number
542 - 391 = 151
151 ÷ 391 = 0.38618925831202044
0.38618925831202044 x 100 = 38.62%