-83.69% is the change from 662 to 108
Calculation steps:
[( 108 - 662 ) ÷ 662] x 100 = -83.69%
Formula
Percentage change = [(108 - 662) / 662] x 100
Subtract the new number by the original number
108 - 662 = -554
-554 ÷ 662 = -0.8368580060422961
-0.8368580060422961 x 100 = -83.69%