-85.55% is the change from 678 to 98
Calculation steps:
[( 98 - 678 ) ÷ 678] x 100 = -85.55%
Formula
Percentage change = [(98 - 678) / 678] x 100
Subtract the new number by the original number
98 - 678 = -580
-580 ÷ 678 = -0.855457227138643
-0.855457227138643 x 100 = -85.55%