-59.38% is the change from 960 to 390
Calculation steps:
[( 390 - 960 ) ÷ 960] x 100 = -59.38%
Formula
Percentage change = [(390 - 960) / 960] x 100
Subtract the new number by the original number
390 - 960 = -570
-570 ÷ 960 = -0.59375
-0.59375 x 100 = -59.38%