-20.49% is the change from 864 to 687
Calculation steps:
[( 687 - 864 ) ÷ 864] x 100 = -20.49%
Formula
Percentage change = [(687 - 864) / 864] x 100
Subtract the new number by the original number
687 - 864 = -177
-177 ÷ 864 = -0.2048611111111111
-0.2048611111111111 x 100 = -20.49%