-79.68% is the change from 684 to 139
Calculation steps:
[( 139 - 684 ) ÷ 684] x 100 = -79.68%
Formula
Percentage change = [(139 - 684) / 684] x 100
Subtract the new number by the original number
139 - 684 = -545
-545 ÷ 684 = -0.7967836257309941
-0.7967836257309941 x 100 = -79.68%