Marsh Trail is 4/5 miles longer than Woodland Trail.
To find out how much longer Marsh Trail is than Woodland Trail, we need to subtract the Length comparison of Woodland Trail from that of Marsh Trail.
Marsh Trail is 2*4/5 miles long, which is equal to (2/1) * (4/5) = 8/5 miles.
Let's assume that Woodland Trail is 4/5 miles long.
So, the difference between Marsh Trail and Woodland Trail is 8/5 - 4/5 = 4/5 miles.
Therefore, Marsh Trail is 4/5 miles longer than Woodland Trail.