2.68% is the change from 597 to 613
Calculation steps:
[( 613 - 597 ) ÷ 597] x 100 = 2.68%
Formula
Percentage change = [(613 - 597) / 597] x 100
Subtract the new number by the original number
613 - 597 = 16
16 ÷ 597 = 0.02680067001675042
0.02680067001675042 x 100 = 2.68%