-99.85% is the change from 684 to 1
Calculation steps:
[( 1 - 684 ) ÷ 684] x 100 = -99.85%
Formula
Percentage change = [(1 - 684) / 684] x 100
Subtract the new number by the original number
1 - 684 = -683
-683 ÷ 684 = -0.9985380116959064
-0.9985380116959064 x 100 = -99.85%