1203.33% is the change from 30 to 391
Calculation steps:
[( 391 - 30 ) ÷ 30] x 100 = 1203.33%
Formula
Percentage change = [(391 - 30) / 30] x 100
Subtract the new number by the original number
391 - 30 = 361
361 ÷ 30 = 12.033333333333333
12.033333333333333 x 100 = 1203.33%