21.43% is the change from 322 to 391
Calculation steps:
[( 391 - 322 ) ÷ 322] x 100 = 21.43%
Formula
Percentage change = [(391 - 322) / 322] x 100
Subtract the new number by the original number
391 - 322 = 69
69 ÷ 322 = 0.21428571428571427
0.21428571428571427 x 100 = 21.43%