35.09% is the change from 228 to 308
Calculation steps:
[( 308 - 228 ) ÷ 228] x 100 = 35.09%
Formula
Percentage change = [(308 - 228) / 228] x 100
Subtract the new number by the original number
308 - 228 = 80
80 ÷ 228 = 0.3508771929824561
0.3508771929824561 x 100 = 35.09%