Sleeping time of a python in a 24 hour clock is represented by the shaded portion in Fig. 8.3.

The ratio of sleeping time to awaking time is ______.

The ratio of the perimeter of the boundary of the shaded portion tothe perimeter of the whole figure is _______.

The ratio of the area of the shaded portion to that of the whole figure is ______.

A ratio expressed in lowest form has no common factor other than______ in its terms.

To find the ratio of two quantities, they must be expressed in_____units.