55.24% is the change from 391 to 607
Calculation steps:
[( 607 - 391 ) ÷ 391] x 100 = 55.24%
Formula
Percentage change = [(607 - 391) / 391] x 100
Subtract the new number by the original number
607 - 391 = 216
216 ÷ 391 = 0.5524296675191815
0.5524296675191815 x 100 = 55.24%