55.7% is the change from 307 to 478
Calculation steps:
[( 478 - 307 ) ÷ 307] x 100 = 55.7%
Formula
Percentage change = [(478 - 307) / 307] x 100
Subtract the new number by the original number
478 - 307 = 171
171 ÷ 307 = 0.5570032573289903
0.5570032573289903 x 100 = 55.7%