-40.5% is the change from 479 to 285
Calculation steps:
[( 285 - 479 ) ÷ 479] x 100 = -40.5%
Formula
Percentage change = [(285 - 479) / 479] x 100
Subtract the new number by the original number
285 - 479 = -194
-194 ÷ 479 = -0.40501043841336115
-0.40501043841336115 x 100 = -40.5%