-25.03% is the change from 863 to 647
Calculation steps:
[( 647 - 863 ) ÷ 863] x 100 = -25.03%
Formula
Percentage change = [(647 - 863) / 863] x 100
Subtract the new number by the original number
647 - 863 = -216
-216 ÷ 863 = -0.25028968713789107
-0.25028968713789107 x 100 = -25.03%