1423.33% is the change from 30 to 457
Calculation steps:
[( 457 - 30 ) ÷ 30] x 100 = 1423.33%
Formula
Percentage change = [(457 - 30) / 30] x 100
Subtract the new number by the original number
457 - 30 = 427
427 ÷ 30 = 14.233333333333333
14.233333333333333 x 100 = 1423.33%