Question

Of the 660 students eating lunch, 420 purchased their lunch and the rest brought a bag lunch. Find the ratio in simplest form of the number of students purchasing lunch to total number of students eating lunch.

Answer 1

Answer:

7:11.

Explanation:

Number of students eating lunch = 660

Number of students purchasing lunch = 420

The ratio of the number of students purchasing lunch to the total number of students eating lunch will be:

$420\colon660$

We reduce it to its simplest form.

$\begin{gathered} \frac{420}{10}\colon\frac{660}{10} \\ 42\colon66 \\ \frac{42}{6}\colon\frac{66}{6} \\ 7\colon11 \end{gathered}$

The ratio in simplest form is 7:11.