340.74% is the change from 81 to 357
Calculation steps:
[( 357 - 81 ) ÷ 81] x 100 = 340.74%
Formula
Percentage change = [(357 - 81) / 81] x 100
Subtract the new number by the original number
357 - 81 = 276
276 ÷ 81 = 3.4074074074074074
3.4074074074074074 x 100 = 340.74%