40.85% is the change from 306 to 431
Calculation steps:
[( 431 - 306 ) ÷ 306] x 100 = 40.85%
Formula
Percentage change = [(431 - 306) / 306] x 100
Subtract the new number by the original number
431 - 306 = 125
125 ÷ 306 = 0.4084967320261438
0.4084967320261438 x 100 = 40.85%