-63.09% is the change from 867 to 320
Calculation steps:
[( 320 - 867 ) ÷ 867] x 100 = -63.09%
Formula
Percentage change = [(320 - 867) / 867] x 100
Subtract the new number by the original number
320 - 867 = -547
-547 ÷ 867 = -0.6309111880046137
-0.6309111880046137 x 100 = -63.09%