-88.36% is the change from 687 to 80
Calculation steps:
[( 80 - 687 ) ÷ 687] x 100 = -88.36%
Formula
Percentage change = [(80 - 687) / 687] x 100
Subtract the new number by the original number
80 - 687 = -607
-607 ÷ 687 = -0.883551673944687
-0.883551673944687 x 100 = -88.36%