-88.11% is the change from 673 to 80
Calculation steps:
[( 80 - 673 ) ÷ 673] x 100 = -88.11%
Formula
Percentage change = [(80 - 673) / 673] x 100
Subtract the new number by the original number
80 - 673 = -593
-593 ÷ 673 = -0.8811292719167905
-0.8811292719167905 x 100 = -88.11%