1. Splash Screen ratio talk

2. Main Idea/Vocabulary ratio equivalent ratios Write ratios as fractions in simplest form and determine whether two ratios are equivalent.

3. KC 1

4. Example 1 Write Ratios in Simplest Form APPLES Mr. Gale bought a basket of apples. Using the table below, write a ratio comparing the Red Delicious to the Granny Smith apples as a fraction in simplest form. Red Delicious Granny Smith Answer: The ratio of Red Delicious apples to Granny Smith apples is Mr. Gale’s Apples 12Fuji 9 Granny Smith 30Red Delicious

5. 1.A 2.B 3.C 4.D Example 1 A. B. C. D. FLOWERS A garden has 18 roses and 24 tulips. Write a ratio comparing roses to tulips as a fraction in simplest form.

6. Example 2 Identify Equivalent Ratios Determine whether the ratios 12 onions to 15 potatoes and 32 onions to 40 potatoes are equivalent. Write each ratio as a fraction in simplest form. Answer: So, 12:15 and 32:40 are equivalent ratios. The GCF of 12 and 15 is 3. The GCF of 32 and 40 is 8.

7. 1.A 2.B Example 2 A.yes B.no Determine whether the ratios 3 cups vinegar to 8 cups water and 5 cups vinegar to 12 cups of water are equivalent.

8. Example 3 POOLS It is recommended that no more than one person be allowed into the shallow end of an outdoor public pool for every 15 square feet of surface area. If a local pool’s shallow end has a surface area of 1,800 square feet, are the lifeguards correct to allow 120 people into that part of the pool? Recommended ratio Actual ratio Answer: Since the ratios simplify to the same fraction, the lifeguards are correct to allow 120 people into the shallow end of the pool.

9. 1.A 2.B Example 3 A.yes B.no SCHOOL A district claims that they have 1 teacher for every 15 students. If they actually have 2,700 students and 135 teachers, is their claim correct?

10. End of the Lesson