Answer :

Please look at my picture for the process.
View image vhv1122
n/2 - 2n/ 16 = 3/8
(n x 8 / 2 x 8 ) - (2n / 16) = 6 / 16
8n / 16  -  2n / 16  =  6/ 1 6
8n - 2n = 6
6n = 6
n = 6 / 6  = 1
n = 1