21
6/7 - 2/3 = 18/21 - 14/21 = 4/21
6/7 - 2/3 = 18/21 - 14/21 = 4/21
27 - 9 - 6 = 12
27 (-6) = 21
-6 minus -14 is 8.
6/7 - 2/3 = 18/21 - 14/21 = 4/21
Not sure about "you" But 21/14 - 13/14 = 29/14 - 17/14 = 12/14 = 6/7
6
Put as 6/7 - 4/21, change to LCD: 18/21 - 4/21, which is 14/21, or 2/3
17/3 = 119/21 27/7 = 81/21 119/21 - 81/21 = 38/21 or 1 and 17/21
15.