-90.28% is the change from 679 to 66
Calculation steps:
[( 66 - 679 ) ÷ 679] x 100 = -90.28%
Formula
Percentage change = [(66 - 679) / 679] x 100
Subtract the new number by the original number
66 - 679 = -613
-613 ÷ 679 = -0.9027982326951399
-0.9027982326951399 x 100 = -90.28%