0.63% is the change from 319 to 321
Calculation steps:
[( 321 - 319 ) ÷ 319] x 100 = 0.63%
Formula
Percentage change = [(321 - 319) / 319] x 100
Subtract the new number by the original number
321 - 319 = 2
2 ÷ 319 = 0.006269592476489028
0.006269592476489028 x 100 = 0.63%