-86.75% is the change from 649 to 86
Calculation steps:
[( 86 - 649 ) ÷ 649] x 100 = -86.75%
Formula
Percentage change = [(86 - 649) / 649] x 100
Subtract the new number by the original number
86 - 649 = -563
-563 ÷ 649 = -0.8674884437596302
-0.8674884437596302 x 100 = -86.75%