-82.39% is the change from 687 to 121
Calculation steps:
[( 121 - 687 ) ÷ 687] x 100 = -82.39%
Formula
Percentage change = [(121 - 687) / 687] x 100
Subtract the new number by the original number
121 - 687 = -566
-566 ÷ 687 = -0.8238719068413392
-0.8238719068413392 x 100 = -82.39%