6.88% is the change from 320 to 342
Calculation steps:
[( 342 - 320 ) ÷ 320] x 100 = 6.88%
Formula
Percentage change = [(342 - 320) / 320] x 100
Subtract the new number by the original number
342 - 320 = 22
22 ÷ 320 = 0.06875
0.06875 x 100 = 6.88%
Example