-99.19% is the change from 863 to 7
Calculation steps:
[( 7 - 863 ) ÷ 863] x 100 = -99.19%
Formula
Percentage change = [(7 - 863) / 863] x 100
Subtract the new number by the original number
7 - 863 = -856
-856 ÷ 863 = -0.9918887601390498
-0.9918887601390498 x 100 = -99.19%