-89.09% is the change from 669 to 73
Calculation steps:
[( 73 - 669 ) ÷ 669] x 100 = -89.09%
Formula
Percentage change = [(73 - 669) / 669] x 100
Subtract the new number by the original number
73 - 669 = -596
-596 ÷ 669 = -0.890881913303438
-0.890881913303438 x 100 = -89.09%