-66.33% is the change from 686 to 231
Calculation steps:
[( 231 - 686 ) ÷ 686] x 100 = -66.33%
Formula
Percentage change = [(231 - 686) / 686] x 100
Subtract the new number by the original number
231 - 686 = -455
-455 ÷ 686 = -0.6632653061224489
-0.6632653061224489 x 100 = -66.33%