31.92% is the change from 307 to 405
Calculation steps:
[( 405 - 307 ) ÷ 307] x 100 = 31.92%
Formula
Percentage change = [(405 - 307) / 307] x 100
Subtract the new number by the original number
405 - 307 = 98
98 ÷ 307 = 0.31921824104234525
0.31921824104234525 x 100 = 31.92%