-92.58% is the change from 863 to 64
Calculation steps:
[( 64 - 863 ) ÷ 863] x 100 = -92.58%
Formula
Percentage change = [(64 - 863) / 863] x 100
Subtract the new number by the original number
64 - 863 = -799
-799 ÷ 863 = -0.9258400926998841
-0.9258400926998841 x 100 = -92.58%