To determine how wide each column will be in the newspaper layout, we can follow these steps:

Step 1: Understand the total available width

The total width of the newspaper is 22 1/2 inches. First, convert this mixed number to a decimal: $22 \frac{1}{2} = 22.5 \text{ inches}$

Step 2: Subtract the left and right margins

The margins on the left and right sides are 3/8 inch each. So, the total space taken by the margins is: [ 2 \times \frac{3}{8} = \