48.9% is the change from 319 to 475
Calculation steps:
[( 475 - 319 ) ÷ 319] x 100 = 48.9%
Formula
Percentage change = [(475 - 319) / 319] x 100
Subtract the new number by the original number
475 - 319 = 156
156 ÷ 319 = 0.4890282131661442
0.4890282131661442 x 100 = 48.9%