-50% is the change from 960 to 480
Calculation steps:
[( 480 - 960 ) ÷ 960] x 100 = -50%
Formula
Percentage change = [(480 - 960) / 960] x 100
Subtract the new number by the original number
480 - 960 = -480
-480 ÷ 960 = -0.5
-0.5 x 100 = -50%
Example