Explanation

Given:

1/4 (3 4/4 + 4 6/8 + 7 3/12)

Simplify each term:

3 4/4 = 3 + 1 = 4

4 6/8 = 4 + 3/4

7 3/12 = 7 + 1/4

Add the terms:

= 1/4 (4 + 4 + 3/4 + 7 + 1/4)

= 1/4 (15 + 3/4 + 1/4)

= 1/4 (15 + 1)

= 1/4 × 16

= 4