28.74% is the change from 348 to 448
Calculation steps:
[( 448 - 348 ) ÷ 348] x 100 = 28.74%
Formula
Percentage change = [(448 - 348) / 348] x 100
Subtract the new number by the original number
448 - 348 = 100
100 ÷ 348 = 0.28735632183908044
0.28735632183908044 x 100 = 28.74%