1. Ratio and Proportion Review
Workplace and Apprenticeship Math 10

2. Ratios

3. What is our ratio of girls to boys in this room?
Let’s think of some more….

4. A definition to add into your notes:
Definition of “Ratio”

5. Some examples together
In a juice mixture, 75mL of water is mixed with 25mL of juice concentrate. What is the ratio of water to concentrate?
What do we need to know to answer this question successfully?!

6. Some examples together
You’re making cookies for Ms. Ruf, chocolate chip in fact, you add 10 chocolate chips for each tsp. (tea- spoon) of sugar.
What is the ratio of sugar to chocolate chips?
What do we need to know to answer this question successfully?!

7. Some examples together (The hardest!)
On the Sr. boys basketball team, there are 4 grade 10’s, 3 grade 11’s and 5 grade 12’s.
What is the ratio of grade 10s to 11’s to 12’s?
What is the ratio of grade 10’s to the whole team?
What do we need to know to answer this question successfully?!

8. Some examples together
To mix a certain shade of green paint, a painter mixes 2.3L of blue paint with 1.7L of yellow paint. What is the ratio of blue paint to yellow paint?

9. Your turn! Complete: “Ratios and Rates” Review
Assignment #1 – Simplifying Fractions

10. Proportion Review Section
Definition time!!!

11. Proportion Review
Cross multiplication

12. Your turn…
Complete Assignment #2 – Cross Multiply and Divide

13. You turn - Ratios in Word Problems
Complete Assignment #3 – Working With Ratio

14. How do we solve for missing variables?!
If Mr. Wandy can arm wrestle 6 students in 5 minutes, how many students can he arm wrestle in:
15 minutes?
23 minutes?

15. How do we solve for missing variables?!
A dirt bike requires 15L of gasoline to be mixed with 4L of oil. If your jerry-can holds 20L of gasoline, how much oil will you need to add in?

16. Your turn – Solving Proportions
Complete Assignment #4 – Working With Proportions
AND
Solving Proportions Word Problems

18. Your turn! Quick practice (10 minutes)
1) A recipe for cookies asks for 500mL of flour, 250mL of brown sugar, and 125mL of water. In lowest terms, what is the ratio of:
Sugar to flour
Sugar to water
Water to flour and sugar together