49.12% is the change from 228 to 340
Calculation steps:
[( 340 - 228 ) ÷ 228] x 100 = 49.12%
Formula
Percentage change = [(340 - 228) / 228] x 100
Subtract the new number by the original number
340 - 228 = 112
112 ÷ 228 = 0.49122807017543857
0.49122807017543857 x 100 = 49.12%