Expressing whole numbers as fractions

Being asked to express a natural number as a fraction seems confusing at first but you need to just know that for any whole number n, you express it as a fraction with \frac{n}{1}.

Express 8 as an equivalent fraction having the denominator 5

8 = \frac{8}{1} = \frac{8 \cdot 5}{1 \cdot 5} = \frac{40}{5}