3.91% is the change from 307 to 319
Calculation steps:
[( 319 - 307 ) ÷ 307] x 100 = 3.91%
Formula
Percentage change = [(319 - 307) / 307] x 100
Subtract the new number by the original number
319 - 307 = 12
12 ÷ 307 = 0.03908794788273615
0.03908794788273615 x 100 = 3.91%