VIDEO #1 - Worked Example: Hot dogs
https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-write-and-solve-proportions/v/using-proportion-to-solve-for-variable
VIDEO #2 - Writing Proportions: Proportion Set Up
https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/modal/v/writing-proportions
CLASSWORK
1) 9 markers cost $11.50. How much would 7 markers cost?
2) 7 apples cost $5. How many apples can be purchased with $8?
3) A cake recipe for 5 people requires 2 eggs. How many eggs are needed for 15 people?