40.54% is the change from 597 to 839
Calculation steps:
[( 839 - 597 ) ÷ 597] x 100 = 40.54%
Formula
Percentage change = [(839 - 597) / 597] x 100
Subtract the new number by the original number
839 - 597 = 242
242 ÷ 597 = 0.4053601340033501
0.4053601340033501 x 100 = 40.54%