304.71% is the change from 85 to 344
Calculation steps:
[( 344 - 85 ) ÷ 85] x 100 = 304.71%
Formula
Percentage change = [(344 - 85) / 85] x 100
Subtract the new number by the original number
344 - 85 = 259
259 ÷ 85 = 3.0470588235294116
3.0470588235294116 x 100 = 304.71%