1420% is the change from 30 to 456
Calculation steps:
[( 456 - 30 ) ÷ 30] x 100 = 1420%
Formula
Percentage change = [(456 - 30) / 30] x 100
Subtract the new number by the original number
456 - 30 = 426
426 ÷ 30 = 14.2
14.2 x 100 = 1420%
Example