41.07% is the change from 319 to 450
Calculation steps:
[( 450 - 319 ) ÷ 319] x 100 = 41.07%
Formula
Percentage change = [(450 - 319) / 319] x 100
Subtract the new number by the original number
450 - 319 = 131
131 ÷ 319 = 0.4106583072100313
0.4106583072100313 x 100 = 41.07%