6.23% is the change from 321 to 341
Calculation steps:
[( 341 - 321 ) ÷ 321] x 100 = 6.23%
Formula
Percentage change = [(341 - 321) / 321] x 100
Subtract the new number by the original number
341 - 321 = 20
20 ÷ 321 = 0.06230529595015576
0.06230529595015576 x 100 = 6.23%