30800% is the change from 1 to 309
Calculation steps:
[( 309 - 1 ) ÷ 1] x 100 = 30800%
Formula
Percentage change = [(309 - 1) / 1] x 100
Subtract the new number by the original number
309 - 1 = 308
308 ÷ 1 = 308
308 x 100 = 30800%
Example