6.58% is the change from 304 to 324
Calculation steps:
[( 324 - 304 ) ÷ 304] x 100 = 6.58%
Formula
Percentage change = [(324 - 304) / 304] x 100
Subtract the new number by the original number
324 - 304 = 20
20 ÷ 304 = 0.06578947368421052
0.06578947368421052 x 100 = 6.58%