338.27% is the change from 81 to 355
Calculation steps:
[( 355 - 81 ) ÷ 81] x 100 = 338.27%
Formula
Percentage change = [(355 - 81) / 81] x 100
Subtract the new number by the original number
355 - 81 = 274
274 ÷ 81 = 3.382716049382716
3.382716049382716 x 100 = 338.27%