-83.76% is the change from 665 to 108
Calculation steps:
[( 108 - 665 ) ÷ 665] x 100 = -83.76%
Formula
Percentage change = [(108 - 665) / 665] x 100
Subtract the new number by the original number
108 - 665 = -557
-557 ÷ 665 = -0.837593984962406
-0.837593984962406 x 100 = -83.76%