What fraction of the object's kinetic energy is lost during a single collision?

[07accordEX]

Homework Statement

The coefficient of the restitution of an object is defined as the ratio of its outgoing to incoming speed when the object collides with a rigid surface. For an object with a coefficient of 0.59, what fraction of the object's kinetic energy is lost during a single collision?

Homework Equations

KE = 1/2mv^2
kinetic friction coefficient = F_kinetic/F_normal

The Attempt at a Solution

I am so confused... I hate these problems where the information isn't given to solve for something,someone point me in the right direction please

 

[BAnders1]

Coefficient of restitution:

$$\frac{v_{final}}{v_{initial}}=0.59$$

You are looking for

$$\frac{K_{final}}{K_{initial}}$$

The information you need is given.