-83.28% is the change from 646 to 108
Calculation steps:
[( 108 - 646 ) ÷ 646] x 100 = -83.28%
Formula
Percentage change = [(108 - 646) / 646] x 100
Subtract the new number by the original number
108 - 646 = -538
-538 ÷ 646 = -0.8328173374613003
-0.8328173374613003 x 100 = -83.28%