57.38% is the change from 305 to 480
Calculation steps:
[( 480 - 305 ) ÷ 305] x 100 = 57.38%
Formula
Percentage change = [(480 - 305) / 305] x 100
Subtract the new number by the original number
480 - 305 = 175
175 ÷ 305 = 0.5737704918032787
0.5737704918032787 x 100 = 57.38%