48.05% is the change from 308 to 456
Calculation steps:
[( 456 - 308 ) ÷ 308] x 100 = 48.05%
Formula
Percentage change = [(456 - 308) / 308] x 100
Subtract the new number by the original number
456 - 308 = 148
148 ÷ 308 = 0.4805194805194805
0.4805194805194805 x 100 = 48.05%