-79.3% is the change from 686 to 142
Calculation steps:
[( 142 - 686 ) ÷ 686] x 100 = -79.3%
Formula
Percentage change = [(142 - 686) / 686] x 100
Subtract the new number by the original number
142 - 686 = -544
-544 ÷ 686 = -0.793002915451895
-0.793002915451895 x 100 = -79.3%