38.64% is the change from 220 to 305
Calculation steps:
[( 305 - 220 ) ÷ 220] x 100 = 38.64%
Formula
Percentage change = [(305 - 220) / 220] x 100
Subtract the new number by the original number
305 - 220 = 85
85 ÷ 220 = 0.38636363636363635
0.38636363636363635 x 100 = 38.64%