270.59% is the change from 85 to 315
Calculation steps:
[( 315 - 85 ) ÷ 85] x 100 = 270.59%
Formula
Percentage change = [(315 - 85) / 85] x 100
Subtract the new number by the original number
315 - 85 = 230
230 ÷ 85 = 2.7058823529411766
2.7058823529411766 x 100 = 270.59%