-98.1% is the change from 684 to 13
Calculation steps:
[( 13 - 684 ) ÷ 684] x 100 = -98.1%
Formula
Percentage change = [(13 - 684) / 684] x 100
Subtract the new number by the original number
13 - 684 = -671
-671 ÷ 684 = -0.9809941520467836
-0.9809941520467836 x 100 = -98.1%