-13.54% is the change from 960 to 830
Calculation steps:
[( 830 - 960 ) ÷ 960] x 100 = -13.54%
Formula
Percentage change = [(830 - 960) / 960] x 100
Subtract the new number by the original number
830 - 960 = -130
-130 ÷ 960 = -0.13541666666666666
-0.13541666666666666 x 100 = -13.54%