40.52% is the change from 306 to 430
Calculation steps:
[( 430 - 306 ) ÷ 306] x 100 = 40.52%
Formula
Percentage change = [(430 - 306) / 306] x 100
Subtract the new number by the original number
430 - 306 = 124
124 ÷ 306 = 0.40522875816993464
0.40522875816993464 x 100 = 40.52%