34.8% is the change from 227 to 306
Calculation steps:
[( 306 - 227 ) ÷ 227] x 100 = 34.8%
Formula
Percentage change = [(306 - 227) / 227] x 100
Subtract the new number by the original number
306 - 227 = 79
79 ÷ 227 = 0.34801762114537443
0.34801762114537443 x 100 = 34.8%