-15.92% is the change from 760 to 639
Calculation steps:
[( 639 - 760 ) ÷ 760] x 100 = -15.92%
Formula
Percentage change = [(639 - 760) / 760] x 100
Subtract the new number by the original number
639 - 760 = -121
-121 ÷ 760 = -0.15921052631578947
-0.15921052631578947 x 100 = -15.92%