Best Answer

It depends:

7/8/9/10 can be:

7/(8/(9/10)) = 7/(80/9) = 63/80, or

7/((8/9)/10) = 7/(8/90) = 7/(4/45) = 315/4

(7/8)/(9/10) = 70/72 = 35/36

(7/(8/9))/10 = (63/8)/10 = 63/80

((7/8)/9)/10 = (7/72)/10 = 7/720

* * * * *

There is an "and" between 8 and 9 so the question, in fact, refers to 7/8 + 9/10 which is not ambiguous.

7/8 + 9/10 = 35/40 + 36/40 = 71/40 = 1 and 31/40

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Q: What is the real number of 7 over 8 and 9 over 10?

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