-97.33% is the change from 673 to 18
Calculation steps:
[( 18 - 673 ) ÷ 673] x 100 = -97.33%
Formula
Percentage change = [(18 - 673) / 673] x 100
Subtract the new number by the original number
18 - 673 = -655
-655 ÷ 673 = -0.9732540861812778
-0.9732540861812778 x 100 = -97.33%