-75% is the change from 480 to 120
Calculation steps:
[( 120 - 480 ) ÷ 480] x 100 = -75%
Formula
Percentage change = [(120 - 480) / 480] x 100
Subtract the new number by the original number
120 - 480 = -360
-360 ÷ 480 = -0.75
-0.75 x 100 = -75%
Example