-89.15% is the change from 673 to 73
Calculation steps:
[( 73 - 673 ) ÷ 673] x 100 = -89.15%
Formula
Percentage change = [(73 - 673) / 673] x 100
Subtract the new number by the original number
73 - 673 = -600
-600 ÷ 673 = -0.8915304606240714
-0.8915304606240714 x 100 = -89.15%