12.21% is the change from 639 to 717
Calculation steps:
[( 717 - 639 ) ÷ 639] x 100 = 12.21%
Formula
Percentage change = [(717 - 639) / 639] x 100
Subtract the new number by the original number
717 - 639 = 78
78 ÷ 639 = 0.12206572769953052
0.12206572769953052 x 100 = 12.21%