-16.47% is the change from 765 to 639
Calculation steps:
[( 639 - 765 ) ÷ 765] x 100 = -16.47%
Formula
Percentage change = [(639 - 765) / 765] x 100
Subtract the new number by the original number
639 - 765 = -126
-126 ÷ 765 = -0.16470588235294117
-0.16470588235294117 x 100 = -16.47%