15.47% is the change from 640 to 739
Calculation steps:
[( 739 - 640 ) ÷ 640] x 100 = 15.47%
Formula
Percentage change = [(739 - 640) / 640] x 100
Subtract the new number by the original number
739 - 640 = 99
99 ÷ 640 = 0.1546875
0.1546875 x 100 = 15.47%