In a rectangle ABCD , point E is on side CD. The area of triangle ADE is one-fifth of the area of quadrilateral ABCE. What is the ratio of the length of segment DE to the length of segment DC? Express your answer as a common fraction.
In a rectangle ABCD, point E is on side CD. The area of triangle ADE is one-fifth of the area of quadrilateral ABCE. What is the ratio of the length of segment DE to the length of segment DC? Express your answer as a common fraction.
+230 
