-89.77% is the change from 665 to 68
Calculation steps:
[( 68 - 665 ) ÷ 665] x 100 = -89.77%
Formula
Percentage change = [(68 - 665) / 665] x 100
Subtract the new number by the original number
68 - 665 = -597
-597 ÷ 665 = -0.8977443609022556
-0.8977443609022556 x 100 = -89.77%