-98.82% is the change from 678 to 8
Calculation steps:
[( 8 - 678 ) ÷ 678] x 100 = -98.82%
Formula
Percentage change = [(8 - 678) / 678] x 100
Subtract the new number by the original number
8 - 678 = -670
-670 ÷ 678 = -0.9882005899705014
-0.9882005899705014 x 100 = -98.82%