The midpoints of the sides of a rectangle are joined by straight lines as shown.
Work out the percentage of the rectangle that is shaded.
![The midpoints of the sides of a rectangle are joined by straight lines as shown Work out the percentage of the rectangle that is shaded class=](https://us-static.z-dn.net/files/d87/215855c36869677de1f39e8c70917ff2.png)