-72.74% is the change from 686 to 187
Calculation steps:
[( 187 - 686 ) ÷ 686] x 100 = -72.74%
Formula
Percentage change = [(187 - 686) / 686] x 100
Subtract the new number by the original number
187 - 686 = -499
-499 ÷ 686 = -0.7274052478134111
-0.7274052478134111 x 100 = -72.74%