-74.44% is the change from 665 to 170
Calculation steps:
[( 170 - 665 ) ÷ 665] x 100 = -74.44%
Formula
Percentage change = [(170 - 665) / 665] x 100
Subtract the new number by the original number
170 - 665 = -495
-495 ÷ 665 = -0.7443609022556391
-0.7443609022556391 x 100 = -74.44%