127.25% is the change from 400 to 909
Calculation steps:
[( 909 - 400 ) ÷ 400] x 100 = 127.25%
Formula
Percentage change = [(909 - 400) / 400] x 100
Subtract the new number by the original number
909 - 400 = 509
509 ÷ 400 = 1.2725
1.2725 x 100 = 127.25%