54.58% is the change from 284 to 439
Calculation steps:
[( 439 - 284 ) ÷ 284] x 100 = 54.58%
Formula
Percentage change = [(439 - 284) / 284] x 100
Subtract the new number by the original number
439 - 284 = 155
155 ÷ 284 = 0.545774647887324
0.545774647887324 x 100 = 54.58%