Answer: She should color 4 sections to look like Sara's.
Explanation:
Since we have given that
Part of paper of Sarah coloured green is given by

Number of times Melanie folded her paper = 8
We need to find the "Number of sections Melanie should color to make her paper look just like Sara":
Number of sections Melanie should color is given by

Hence, She should color 4 sections to look like Sara's.