a.

Let’s break this down step by step! First, we calculate the denominator: . So we have . Simplifying gives us . Now, multiplying means and dividing that by 5 gives us or 1.6. Voilà!

If you’re doing calculations like this often, think about simplifying fractions early on—it saves time! A common mistake is forgetting to simplify until the end; always keep an eye out for opportunities to cancel out numbers along the way for faster results!