54.04% is the change from 285 to 439
Calculation steps:
[( 439 - 285 ) ÷ 285] x 100 = 54.04%
Formula
Percentage change = [(439 - 285) / 285] x 100
Subtract the new number by the original number
439 - 285 = 154
154 ÷ 285 = 0.5403508771929825
0.5403508771929825 x 100 = 54.04%