-25.49% is the change from 863 to 643
Calculation steps:
[( 643 - 863 ) ÷ 863] x 100 = -25.49%
Formula
Percentage change = [(643 - 863) / 863] x 100
Subtract the new number by the original number
643 - 863 = -220
-220 ÷ 863 = -0.2549246813441483
-0.2549246813441483 x 100 = -25.49%