-14.58% is the change from 960 to 820
Calculation steps:
[( 820 - 960 ) ÷ 960] x 100 = -14.58%
Formula
Percentage change = [(820 - 960) / 960] x 100
Subtract the new number by the original number
820 - 960 = -140
-140 ÷ 960 = -0.14583333333333334
-0.14583333333333334 x 100 = -14.58%