307.06% is the change from 85 to 346
Calculation steps:
[( 346 - 85 ) ÷ 85] x 100 = 307.06%
Formula
Percentage change = [(346 - 85) / 85] x 100
Subtract the new number by the original number
346 - 85 = 261
261 ÷ 85 = 3.070588235294118
3.070588235294118 x 100 = 307.06%