9.92% is the change from 645 to 709
Calculation steps:
[( 709 - 645 ) ÷ 645] x 100 = 9.92%
Formula
Percentage change = [(709 - 645) / 645] x 100
Subtract the new number by the original number
709 - 645 = 64
64 ÷ 645 = 0.09922480620155039
0.09922480620155039 x 100 = 9.92%