-17.36% is the change from 772 to 638
Calculation steps:
[( 638 - 772 ) ÷ 772] x 100 = -17.36%
Formula
Percentage change = [(638 - 772) / 772] x 100
Subtract the new number by the original number
638 - 772 = -134
-134 ÷ 772 = -0.17357512953367876
-0.17357512953367876 x 100 = -17.36%