34.17% is the change from 319 to 428
Calculation steps:
[( 428 - 319 ) ÷ 319] x 100 = 34.17%
Formula
Percentage change = [(428 - 319) / 319] x 100
Subtract the new number by the original number
428 - 319 = 109
109 ÷ 319 = 0.34169278996865204
0.34169278996865204 x 100 = 34.17%