The document provides a review for a test on ratios, rates, and proportional relationships. It includes the following topics: 1. Ratio and rate word problems 2. Unit rates 3. Converting between measurement units using ratios 4. Setting up and solving proportions to solve measurement problems It notes that all Khan Academy assignments are due by Friday and too many students have a grade of zero on the homework, which counts for 20% of the overall grade. Students are encouraged to complete any outstanding work by December 20.

1. Review for Test Tomorrow
All Khan Academy Due by Friday
Ratios/Rates/Unit Rates
Measurement Ratios
Class Work
..

2. 1. Ratio Word Problems
2. Rate Problems .5
3. Rates & Proportional Relationships
Topics are due by December 20 for online and Alt.Khan.
**Waaaaay too many people have a grade
of zero for their homework grade
(Khan), which is 20% of your overall
grade.

3. The ratio 90 can be simplified by dividing:
3
90 = 30
3
1
Unit rate:
30 miles,
1 hour
or 30 mi/(1)h

4. 1. A 64 oz. Apple Juice costs $1.35. Find the unit rate.
Which unit, (oz. or $) do we want to reduce to 1?
2. A 12 slice pizza costs $9.00. Find the unit rate.
3. Which is the better buy: A 12 oz. bottle of juice
for $0.85, or an 8 oz. can of juice for $0.50?

5. Unit Conversions

6. Ratios Involving Measurement
Convert larger unit (ft) to the smaller unit (in).
1. Express the ratio 6 feet to 15 inches as a fraction in
simplest form.
Six feet = 72 in. Simplify 72/15; the answer is 24/5
*Change the larger unit to the smaller one. 3 pints = 6cups.
The ratio is now 6 cups to 2 cups. Simplify to: 3/1

8. Converting Rates & Measurement: Practice

9. Proportions
The shadow of a 4 ft. tall mailbox is 3 ft. long.
If the shadow of a tree is 36 ft. long, how tall
is the tree?
height =
shadow
height
shadow
4
3
H
36
=
144 = 3H H = 48
You must be careful to place the
same quantities in corresponding
positions in the proportion
The tree is 48 ft. tall
9

10. Class Work:
Percent Proportion & Ratio/Rates Handout