6.21% is the change from 306 to 325
Calculation steps:
[( 325 - 306 ) ÷ 306] x 100 = 6.21%
Formula
Percentage change = [(325 - 306) / 306] x 100
Subtract the new number by the original number
325 - 306 = 19
19 ÷ 306 = 0.06209150326797386
0.06209150326797386 x 100 = 6.21%