37.86% is the change from 309 to 426
Calculation steps:
[( 426 - 309 ) ÷ 309] x 100 = 37.86%
Formula
Percentage change = [(426 - 309) / 309] x 100
Subtract the new number by the original number
426 - 309 = 117
117 ÷ 309 = 0.3786407766990291
0.3786407766990291 x 100 = 37.86%