399.01% is the change from 101 to 504
Calculation steps:
[( 504 - 101 ) ÷ 101] x 100 = 399.01%
Formula
Percentage change = [(504 - 101) / 101] x 100
Subtract the new number by the original number
504 - 101 = 403
403 ÷ 101 = 3.99009900990099
3.99009900990099 x 100 = 399.01%