-98.97% is the change from 678 to 7
Calculation steps:
[( 7 - 678 ) ÷ 678] x 100 = -98.97%
Formula
Percentage change = [(7 - 678) / 678] x 100
Subtract the new number by the original number
7 - 678 = -671
-671 ÷ 678 = -0.9896755162241888
-0.9896755162241888 x 100 = -98.97%