302.33% is the change from 86 to 346
Calculation steps:
[( 346 - 86 ) ÷ 86] x 100 = 302.33%
Formula
Percentage change = [(346 - 86) / 86] x 100
Subtract the new number by the original number
346 - 86 = 260
260 ÷ 86 = 3.0232558139534884
3.0232558139534884 x 100 = 302.33%