38.18% is the change from 220 to 304
Calculation steps:
[( 304 - 220 ) ÷ 220] x 100 = 38.18%
Formula
Percentage change = [(304 - 220) / 220] x 100
Subtract the new number by the original number
304 - 220 = 84
84 ÷ 220 = 0.38181818181818183
0.38181818181818183 x 100 = 38.18%