A square pen that is surrounded by a fence is divided into two rectangular

regions by adding a new fence that connects the midpoints of two opposite
sides. By what percent has the total length of fencing been increased?

4 answers

L2 = (5/4)L1 = 1.25
.25 * 100 = ?
can you please explain in detail? thanks.
I had 4 equal lengths each of length L1
I added one L1 so had total = 5 L1
total/original = 5/4 = 1 + 1/4
so added 1/4 or 25% of original length
houda