10.31% is the change from 640 to 706
Calculation steps:
[( 706 - 640 ) ÷ 640] x 100 = 10.31%
Formula
Percentage change = [(706 - 640) / 640] x 100
Subtract the new number by the original number
706 - 640 = 66
66 ÷ 640 = 0.103125
0.103125 x 100 = 10.31%