Final answer:
The number that needs to be added to 3/4 to get 5/6, subtract 3/4 from 5/6.
Step-by-step explanation:
To find the number that needs to be added to 3/4 to get 5/6, we need to subtract 3/4 from 5/6. Subtracting fractions involves finding a common denominator and then subtracting the numerators. In this case, the common denominator is 12. So:
5/6 - 3/4 = 10/12 - 9/12 = 1/12
Therefore, the number that needs to be added to 3/4 to get 5/6 is 1/12.