-58.39% is the change from 959 to 399
Calculation steps:
[( 399 - 959 ) ÷ 959] x 100 = -58.39%
Formula
Percentage change = [(399 - 959) / 959] x 100
Subtract the new number by the original number
399 - 959 = -560
-560 ÷ 959 = -0.583941605839416
-0.583941605839416 x 100 = -58.39%