8.38% is the change from 597 to 647
Calculation steps:
[( 647 - 597 ) ÷ 597] x 100 = 8.38%
Formula
Percentage change = [(647 - 597) / 597] x 100
Subtract the new number by the original number
647 - 597 = 50
50 ÷ 597 = 0.08375209380234507
0.08375209380234507 x 100 = 8.38%