39.6% is the change from 303 to 423
Calculation steps:
[( 423 - 303 ) ÷ 303] x 100 = 39.6%
Formula
Percentage change = [(423 - 303) / 303] x 100
Subtract the new number by the original number
423 - 303 = 120
120 ÷ 303 = 0.39603960396039606
0.39603960396039606 x 100 = 39.6%