34.6% is the change from 448 to 603
Calculation steps:
[( 603 - 448 ) ÷ 448] x 100 = 34.6%
Formula
Percentage change = [(603 - 448) / 448] x 100
Subtract the new number by the original number
603 - 448 = 155
155 ÷ 448 = 0.34598214285714285
0.34598214285714285 x 100 = 34.6%