-89.02% is the change from 665 to 73
Calculation steps:
[( 73 - 665 ) ÷ 665] x 100 = -89.02%
Formula
Percentage change = [(73 - 665) / 665] x 100
Subtract the new number by the original number
73 - 665 = -592
-592 ÷ 665 = -0.8902255639097745
-0.8902255639097745 x 100 = -89.02%