-95.58% is the change from 678 to 30
Calculation steps:
[( 30 - 678 ) ÷ 678] x 100 = -95.58%
Formula
Percentage change = [(30 - 678) / 678] x 100
Subtract the new number by the original number
30 - 678 = -648
-648 ÷ 678 = -0.9557522123893806
-0.9557522123893806 x 100 = -95.58%