It is -25/36
Well, darling, 17 over 18 minus 2 over 3 is the same as 17 times 3 minus 2 times 18, all over 18 times 3. So, that gives you 51 minus 36 over 54, which simplifies to 15 over 54, or 5 over 18. Math doesn't have to be a drag, honey!
3
18 - 17 = 1
17/18
-18
-17 - 18 = -35
-1132/33
Negative 18 minus positive 12 is negative 30.
1217/18+42/3... First - deal with the whole numbers... 12+4=16.Next make both fractions have the same denominator. Since they're both factors of 18, make them both over 18, so you get 17/18+12/18. This equals 29/19 or 111/18 - now - add the original 16 (from the first bit) and your grand total is 1711/18
17
4 and 17/18
17/18 minus 2/3 is 5/18