38.84% is the change from 224 to 311
Calculation steps:
[( 311 - 224 ) ÷ 224] x 100 = 38.84%
Formula
Percentage change = [(311 - 224) / 224] x 100
Subtract the new number by the original number
311 - 224 = 87
87 ÷ 224 = 0.38839285714285715
0.38839285714285715 x 100 = 38.84%