316.05% is the change from 81 to 337
Calculation steps:
[( 337 - 81 ) ÷ 81] x 100 = 316.05%
Formula
Percentage change = [(337 - 81) / 81] x 100
Subtract the new number by the original number
337 - 81 = 256
256 ÷ 81 = 3.1604938271604937
3.1604938271604937 x 100 = 316.05%