43.7% is the change from 270 to 388
Calculation steps:
[( 388 - 270 ) ÷ 270] x 100 = 43.7%
Formula
Percentage change = [(388 - 270) / 270] x 100
Subtract the new number by the original number
388 - 270 = 118
118 ÷ 270 = 0.43703703703703706
0.43703703703703706 x 100 = 43.7%