3.21% is the change from 312 to 322
Calculation steps:
[( 322 - 312 ) ÷ 312] x 100 = 3.21%
Formula
Percentage change = [(322 - 312) / 312] x 100
Subtract the new number by the original number
322 - 312 = 10
10 ÷ 312 = 0.03205128205128205
0.03205128205128205 x 100 = 3.21%