67 5/12 - 60 8/9 find the common denominator which is 36
67 15/36 - 60 32/36 then borrow from the 67 ( whatever your denominator is is the number you use ex 36/36 = 1) so reduce the 67 by one which will be 66 then add the one to the numerator
now you have the problem 66 15/36+36/36 = 66 51/36
- 60 32/36
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6 19/36 inches taller than daughter