-60.9% is the change from 867 to 339
Calculation steps:
[( 339 - 867 ) ÷ 867] x 100 = -60.9%
Formula
Percentage change = [(339 - 867) / 867] x 100
Subtract the new number by the original number
339 - 867 = -528
-528 ÷ 867 = -0.6089965397923875
-0.6089965397923875 x 100 = -60.9%