Final answer:
The fraction of the wall that is concrete is 14 inches divided by the total wall width of 30 inches, which equals ⅓ or 7/15.
Step-by-step explanation:
To find the fraction of the wall that is concrete, we need to determine the length of the concrete section and compare it to the total length of the wall. The length of the concrete section is 14 inches, while the total length of the wall is 30 inches. Therefore, the fraction of the wall that is concrete is 14/30 or 7/15
The fraction of the wall that is concrete is calculated by dividing the width of the concrete section by the total width of the wall. Since the building wall is 30 inches wide with fourteen inches of concrete, we find the fraction by dividing 14 inches by 30 inches, which simplifies to ⅓ (7/15).