272.09% is the change from 86 to 320
Calculation steps:
[( 320 - 86 ) ÷ 86] x 100 = 272.09%
Formula
Percentage change = [(320 - 86) / 86] x 100
Subtract the new number by the original number
320 - 86 = 234
234 ÷ 86 = 2.7209302325581395
2.7209302325581395 x 100 = 272.09%