0.31% is the change from 319 to 320
Calculation steps:
[( 320 - 319 ) ÷ 319] x 100 = 0.31%
Formula
Percentage change = [(320 - 319) / 319] x 100
Subtract the new number by the original number
320 - 319 = 1
1 ÷ 319 = 0.003134796238244514
0.003134796238244514 x 100 = 0.31%