-40.63% is the change from 480 to 285
Calculation steps:
[( 285 - 480 ) ÷ 480] x 100 = -40.63%
Formula
Percentage change = [(285 - 480) / 480] x 100
Subtract the new number by the original number
285 - 480 = -195
-195 ÷ 480 = -0.40625
-0.40625 x 100 = -40.63%