The best estimate for the sum of the given fractions is; ¹¹/₂₄
We want to find the sum of the fractions 3/8 and 1/12.
This is expressed as;
³/₈ + ¹/₁₂
Factorizing 1/24 out, we will have;
¹/₂₄(9 + 2)
⇒ 11(¹/₂₄)
⇒ ¹¹/₂₄
Read more about addition of fractions at; https://brainly.com/question/11562149