42400% is the change from 1 to 425
Calculation steps:
[( 425 - 1 ) ÷ 1] x 100 = 42400%
Formula
Percentage change = [(425 - 1) / 1] x 100
Subtract the new number by the original number
425 - 1 = 424
424 ÷ 1 = 424
424 x 100 = 42400%
Example