As a fraction, half of 5/8 equals 5/16. As a decimal, 5/8 is.625. There are 16 hundredths of an inch in 1/4 inch. 5/8 is exactly two fifths of an inch wide. This means that it is equal to 2 x 1/20 or 0.05 mm thick. The area of a circle is equal to πr2 where r is the radius. In this case, r = 5/8 inches or 3.125 inches. The area of a circle is important because it is used in calculating many different things, such as volume and mass. A pie chart is a type of diagram that shows the distribution of values within a group. A pie chart is often used to show the components of a total value or percentage. It is also useful for comparing several categories at once. A ring chart is a type of chart that displays information in a circular layout. Ring charts can be used to show the progress of projects or events, and they are particularly common when displaying data from a database.