-95.54% is the change from 673 to 30
Calculation steps:
[( 30 - 673 ) ÷ 673] x 100 = -95.54%
Formula
Percentage change = [(30 - 673) / 673] x 100
Subtract the new number by the original number
30 - 673 = -643
-643 ÷ 673 = -0.9554234769687965
-0.9554234769687965 x 100 = -95.54%