50400% is the change from 1 to 505
Calculation steps:
[( 505 - 1 ) ÷ 1] x 100 = 50400%
Formula
Percentage change = [(505 - 1) / 1] x 100
Subtract the new number by the original number
505 - 1 = 504
504 ÷ 1 = 504
504 x 100 = 50400%
Example