50.47% is the change from 319 to 480
Calculation steps:
[( 480 - 319 ) ÷ 319] x 100 = 50.47%
Formula
Percentage change = [(480 - 319) / 319] x 100
Subtract the new number by the original number
480 - 319 = 161
161 ÷ 319 = 0.5047021943573667
0.5047021943573667 x 100 = 50.47%