97.72% is the change from 307 to 607
Calculation steps:
[( 607 - 307 ) ÷ 307] x 100 = 97.72%
Formula
Percentage change = [(607 - 307) / 307] x 100
Subtract the new number by the original number
607 - 307 = 300
300 ÷ 307 = 0.9771986970684039
0.9771986970684039 x 100 = 97.72%