37.85% is the change from 391 to 539
Calculation steps:
[( 539 - 391 ) ÷ 391] x 100 = 37.85%
Formula
Percentage change = [(539 - 391) / 391] x 100
Subtract the new number by the original number
539 - 391 = 148
148 ÷ 391 = 0.37851662404092073
0.37851662404092073 x 100 = 37.85%