20.31% is the change from 448 to 539
Calculation steps:
[( 539 - 448 ) ÷ 448] x 100 = 20.31%
Formula
Percentage change = [(539 - 448) / 448] x 100
Subtract the new number by the original number
539 - 448 = 91
91 ÷ 448 = 0.203125
0.203125 x 100 = 20.31%