It's 14.
12/14
6/7 = 12/14
12/14 + 7/14 = 19/14
No - 2/14 is equal to 1/7 or one seventh. Three sevenths is equal to 6/14 or six fourteenths.
12/14, 18/21
12/14 = 6/7
6 and six sevenths
No, 6/7=6/7.
6/7, six sevenths
Six sevenths of 42 = 42*6/7 = 36
6/7