51.54% is the change from 390 to 591
Calculation steps:
[( 591 - 390 ) ÷ 390] x 100 = 51.54%
Formula
Percentage change = [(591 - 390) / 390] x 100
Subtract the new number by the original number
591 - 390 = 201
201 ÷ 390 = 0.5153846153846153
0.5153846153846153 x 100 = 51.54%