## The Adults at School

**Work Time**

# The Adults at School

- All adults at Martin Luther King Middle School are either teachers or non-teaching staff members. The ratio of teachers to non-teaching staff is 3:5.

a. What is the ratio of teachers to adults?

b. What is the ratio of non-teaching staff to adults?

c. What is the ratio of non-teaching staff to teachers?

d. What percent of adults is non-teaching staff? Make a diagram to represent the ratio of teachers to non-teaching staff at Martin Luther King Middle School.

There are two types of ratios: part-part ratios and part-whole ratios. Explain why percents are always part-whole ratios. Refer to the tape diagram shown.

For each school listed in the table shown, give the comparison of teachers to non-teaching staff in the following forms: as a whole number ratio (

*a*:*b*), as a decimal (rounded to hundredths), as a fraction in simplest form, and as a percent of the whole.Suppose the ratio of teachers to non-teaching staff at a school is 1:

*r.*

a. Express this ratio as a fraction.

b. What does the expression represent?

c. The teachers make up 40% of the adults at school. Calculate*r*.