314.63% is the change from 82 to 340
Calculation steps:
[( 340 - 82 ) ÷ 82] x 100 = 314.63%
Formula
Percentage change = [(340 - 82) / 82] x 100
Subtract the new number by the original number
340 - 82 = 258
258 ÷ 82 = 3.1463414634146343
3.1463414634146343 x 100 = 314.63%