Answer: 3.25 meters
Step-by-step explanation:
From the question, we are informed that Sean has 12.6 meters of garden netting and that he needs 15.85 meters to enclose his garden.
The meters of netting that Sean need more would be gotten by subtracting 12.6m from 15.85m. This will be:
= 15.85 - 12.6
= 3.25 meters
He needs 3.25 meters more