38.16% is the change from 228 to 315
Calculation steps:
[( 315 - 228 ) ÷ 228] x 100 = 38.16%
Formula
Percentage change = [(315 - 228) / 228] x 100
Subtract the new number by the original number
315 - 228 = 87
87 ÷ 228 = 0.3815789473684211
0.3815789473684211 x 100 = 38.16%