334.57% is the change from 81 to 352
Calculation steps:
[( 352 - 81 ) ÷ 81] x 100 = 334.57%
Formula
Percentage change = [(352 - 81) / 81] x 100
Subtract the new number by the original number
352 - 81 = 271
271 ÷ 81 = 3.345679012345679
3.345679012345679 x 100 = 334.57%