340.91% is the change from 88 to 388
Calculation steps:
[( 388 - 88 ) ÷ 88] x 100 = 340.91%
Formula
Percentage change = [(388 - 88) / 88] x 100
Subtract the new number by the original number
388 - 88 = 300
300 ÷ 88 = 3.409090909090909
3.409090909090909 x 100 = 340.91%