-89.9% is the change from 673 to 68
Calculation steps:
[( 68 - 673 ) ÷ 673] x 100 = -89.9%
Formula
Percentage change = [(68 - 673) / 673] x 100
Subtract the new number by the original number
68 - 673 = -605
-605 ÷ 673 = -0.8989598811292719
-0.8989598811292719 x 100 = -89.9%