1390% is the change from 30 to 447
Calculation steps:
[( 447 - 30 ) ÷ 30] x 100 = 1390%
Formula
Percentage change = [(447 - 30) / 30] x 100
Subtract the new number by the original number
447 - 30 = 417
417 ÷ 30 = 13.9
13.9 x 100 = 1390%
Example