-25.58% is the change from 864 to 643
Calculation steps:
[( 643 - 864 ) ÷ 864] x 100 = -25.58%
Formula
Percentage change = [(643 - 864) / 864] x 100
Subtract the new number by the original number
643 - 864 = -221
-221 ÷ 864 = -0.25578703703703703
-0.25578703703703703 x 100 = -25.58%