-13.28% is the change from 738 to 640
Calculation steps:
[( 640 - 738 ) ÷ 738] x 100 = -13.28%
Formula
Percentage change = [(640 - 738) / 738] x 100
Subtract the new number by the original number
640 - 738 = -98
-98 ÷ 738 = -0.13279132791327913
-0.13279132791327913 x 100 = -13.28%