286.36% is the change from 88 to 340
Calculation steps:
[( 340 - 88 ) ÷ 88] x 100 = 286.36%
Formula
Percentage change = [(340 - 88) / 88] x 100
Subtract the new number by the original number
340 - 88 = 252
252 ÷ 88 = 2.8636363636363638
2.8636363636363638 x 100 = 286.36%