-23.15% is the change from 864 to 664
Calculation steps:
[( 664 - 864 ) ÷ 864] x 100 = -23.15%
Formula
Percentage change = [(664 - 864) / 864] x 100
Subtract the new number by the original number
664 - 864 = -200
-200 ÷ 864 = -0.23148148148148148
-0.23148148148148148 x 100 = -23.15%