-58.44% is the change from 960 to 399
Calculation steps:
[( 399 - 960 ) ÷ 960] x 100 = -58.44%
Formula
Percentage change = [(399 - 960) / 960] x 100
Subtract the new number by the original number
399 - 960 = -561
-561 ÷ 960 = -0.584375
-0.584375 x 100 = -58.44%