56.79% is the change from 280 to 439
Calculation steps:
[( 439 - 280 ) ÷ 280] x 100 = 56.79%
Formula
Percentage change = [(439 - 280) / 280] x 100
Subtract the new number by the original number
439 - 280 = 159
159 ÷ 280 = 0.5678571428571428
0.5678571428571428 x 100 = 56.79%