-72.9% is the change from 668 to 181
Calculation steps:
[( 181 - 668 ) ÷ 668] x 100 = -72.9%
Formula
Percentage change = [(181 - 668) / 668] x 100
Subtract the new number by the original number
181 - 668 = -487
-487 ÷ 668 = -0.7290419161676647
-0.7290419161676647 x 100 = -72.9%