Answer:
of the order.
Explanation:
1. You have that number of carpenters decreases from 5 carpenters to 1 carpenter. Therefore, this decreases by the following factor:

2. The number of days decreases from 8 days to 4 days. Then, the factor is:

3. The order is a furniture, therefore, you can solve the problem as following, where
is the part of the order completed by one carpenter in 4 days:
