70.18% is the change from 228 to 388
Calculation steps:
[( 388 - 228 ) ÷ 228] x 100 = 70.18%
Formula
Percentage change = [(388 - 228) / 228] x 100
Subtract the new number by the original number
388 - 228 = 160
160 ÷ 228 = 0.7017543859649122
0.7017543859649122 x 100 = 70.18%