-98.98% is the change from 685 to 7
Calculation steps:
[( 7 - 685 ) ÷ 685] x 100 = -98.98%
Formula
Percentage change = [(7 - 685) / 685] x 100
Subtract the new number by the original number
7 - 685 = -678
-678 ÷ 685 = -0.9897810218978103
-0.9897810218978103 x 100 = -98.98%