9.15% is the change from 645 to 704
Calculation steps:
[( 704 - 645 ) ÷ 645] x 100 = 9.15%
Formula
Percentage change = [(704 - 645) / 645] x 100
Subtract the new number by the original number
704 - 645 = 59
59 ÷ 645 = 0.09147286821705426
0.09147286821705426 x 100 = 9.15%