264.71% is the change from 85 to 310
Calculation steps:
[( 310 - 85 ) ÷ 85] x 100 = 264.71%
Formula
Percentage change = [(310 - 85) / 85] x 100
Subtract the new number by the original number
310 - 85 = 225
225 ÷ 85 = 2.6470588235294117
2.6470588235294117 x 100 = 264.71%