56.72% is the change from 305 to 478
Calculation steps:
[( 478 - 305 ) ÷ 305] x 100 = 56.72%
Formula
Percentage change = [(478 - 305) / 305] x 100
Subtract the new number by the original number
478 - 305 = 173
173 ÷ 305 = 0.5672131147540984
0.5672131147540984 x 100 = 56.72%