-81.22% is the change from 687 to 129
Calculation steps:
[( 129 - 687 ) ÷ 687] x 100 = -81.22%
Formula
Percentage change = [(129 - 687) / 687] x 100
Subtract the new number by the original number
129 - 687 = -558
-558 ÷ 687 = -0.8122270742358079
-0.8122270742358079 x 100 = -81.22%