-83.86% is the change from 669 to 108
Calculation steps:
[( 108 - 669 ) ÷ 669] x 100 = -83.86%
Formula
Percentage change = [(108 - 669) / 669] x 100
Subtract the new number by the original number
108 - 669 = -561
-561 ÷ 669 = -0.8385650224215246
-0.8385650224215246 x 100 = -83.86%