Explanation

To find the average, we need to convert each fraction to a decimal, add them up, and then divide by the number of fractions.

Here are the fractions converted to decimals:

1.  1/2 = 0.5
2.  5/6 = 0.83 (rounded to two decimal places)
3.  3/4 = 0.75

 5/12 = 0.42 (rounded to two decimal places)

Now, let's add them up:

0.5 + 0.83 + 0.75 + 0.42 = 2.5

Finally, let's divide by the number of fractions (4):

2.5 ÷ 4 = 0.625

To convert this back to a fraction, we get:

0.625 = 5/8