-13.55% is the change from 738 to 638
Calculation steps:
[( 638 - 738 ) ÷ 738] x 100 = -13.55%
Formula
Percentage change = [(638 - 738) / 738] x 100
Subtract the new number by the original number
638 - 738 = -100
-100 ÷ 738 = -0.13550135501355012
-0.13550135501355012 x 100 = -13.55%