Question

27 3/10 - 12 5/9 write in old style math

Answer 1

- 15
`(23)/(50)`

Explanation:

1. We need to make
   `(3)/(10)` and
   `(5)/(9)` have the same denominator, or bottom half, before we can subtract them.
2. In order to do this, we need to find a number that both 10 and 9 (the bottom numbers) both go into. (Hint! Multiplying them together usually helps!)
3. This number is 90. (See? 10 • 9 = 90!)
4. Since we multiplied 10 by 9 to get 90, we need to multiply the top (3) by 9 too, to get us
   `(27)/(90)`.
5. We multiply
   `(5)/(9)` by 10 to get us
   `(50)/(90)`.
6. Now we can subtract 27
   `(27)/(90)` and 12
   `(50)/(90)`.
7. 27 - 12 = 15 (big numbers)
8. 27 - 50 = -23 (fractions)
9. Now we have - 15
   `(23)/(50)`

If I am incorrect in my reasoning, please let me know so that I can plan better for my future answers. Have an amazing day.

Answer 2

273/10 - 113/9

Explanation: