-89.12% is the change from 671 to 73
Calculation steps:
[( 73 - 671 ) ÷ 671] x 100 = -89.12%
Formula
Percentage change = [(73 - 671) / 671] x 100
Subtract the new number by the original number
73 - 671 = -598
-598 ÷ 671 = -0.8912071535022354
-0.8912071535022354 x 100 = -89.12%