6.58% is the change from 319 to 340
Calculation steps:
[( 340 - 319 ) ÷ 319] x 100 = 6.58%
Formula
Percentage change = [(340 - 319) / 319] x 100
Subtract the new number by the original number
340 - 319 = 21
21 ÷ 319 = 0.06583072100313479
0.06583072100313479 x 100 = 6.58%