260.47% is the change from 86 to 310
Calculation steps:
[( 310 - 86 ) ÷ 86] x 100 = 260.47%
Formula
Percentage change = [(310 - 86) / 86] x 100
Subtract the new number by the original number
310 - 86 = 224
224 ÷ 86 = 2.604651162790698
2.604651162790698 x 100 = 260.47%