55.74% is the change from 305 to 475
Calculation steps:
[( 475 - 305 ) ÷ 305] x 100 = 55.74%
Formula
Percentage change = [(475 - 305) / 305] x 100
Subtract the new number by the original number
475 - 305 = 170
170 ÷ 305 = 0.5573770491803278
0.5573770491803278 x 100 = 55.74%