## Act 1

1. Is there really 20% more?

2. Write down a guess.

## Act 2

3. What information would be useful to figure this out?

4. Write down some questions you have in your head right now.

## Act 3

## Sequel

5. How much money should the store charge for this bottle?

6. If the store charges $2.99 for a 40 ounce bottle, how much of a discount should they offer for the faulty product in this lesson?

**Common Core Standards**

7.RP.A.3

Use proportional relationships to solve multistep ratio and percent problems.

HSG.GMD.A.3

Use volume formulas for cylinders, pyramids, cones, and spheres to solve problems.

**TEKS**

7.4(D)

solve problems involving ratios, rates, and percents, including multi-step problems involving percent increase and percent decrease, and financial literacy problems

G.11(D)

apply the formulas for the volume of three-dimensional figures, including prisms, pyramids, cones, cylinders, spheres, and composite figures, to solve problems using appropriate units of measure