329.63% is the change from 81 to 348
Calculation steps:
[( 348 - 81 ) ÷ 81] x 100 = 329.63%
Formula
Percentage change = [(348 - 81) / 81] x 100
Subtract the new number by the original number
348 - 81 = 267
267 ÷ 81 = 3.2962962962962963
3.2962962962962963 x 100 = 329.63%