56.74% is the change from 319 to 500
Calculation steps:
[( 500 - 319 ) ÷ 319] x 100 = 56.74%
Formula
Percentage change = [(500 - 319) / 319] x 100
Subtract the new number by the original number
500 - 319 = 181
181 ÷ 319 = 0.567398119122257
0.567398119122257 x 100 = 56.74%