-99.56% is the change from 680 to 3
Calculation steps:
[( 3 - 680 ) ÷ 680] x 100 = -99.56%
Formula
Percentage change = [(3 - 680) / 680] x 100
Subtract the new number by the original number
3 - 680 = -677
-677 ÷ 680 = -0.9955882352941177
-0.9955882352941177 x 100 = -99.56%