Intro to Ratio Review

What is a Ratio?

• A  comparison of two quantities 
• A rate with a denominator of one
• It is when the only factor the numerator and denominator share is a one 
• Two decimals that can be multiplied

What is the ratio of red circles to blue stars?

• 3:4
• 7/4
• 11/4
• 4 to 7

Which is NOT a way to represent a ratio?

• As a fraction
• Using the word "to"
• With a colon (:)
• None.  All of these are ways to write a ratio.

Mrs. Rachelson paid $3 for 6 muffins and Mrs. Vossekuil paid $9 for 18 muffins.  Did their costs represent equivalent ratios?

• yes, equivalent
• no, not equivalent

Which ratio is equivalent to 12:20

• 20:12
• 2:3
• 3:5
• 3:10

What is the third way to write this ratio? 

• 4/5
• 4 with 5
• 4 to 5
• 4 two 5

Are these ratios equivalent? 
120 calories in 2 servings; 360 calories in 6 servings

• yes, equivalent
• no

Select all that apply. Write a ratio of the first measurement to the second measurement in THREE different ways. 5 weeks, 35 days

• $\frac{5}{35}$

• 5:35

• 35:5

• 5 to 35

• 35 to 5

A class is attended by 16 boys and 32 girls. Write the ratio of GIRLS to BOYS as a fraction in SIMPLEST FORM.

• $\frac{32}{16}$

• $\frac{1}{2}$

• $\frac{16}{32}$

• $\frac{2}{1}$

Use the shapes in the picture to write the ratio of STARS to SQUARES.

• 3 to 2

• 2 to 4

• 4 to 2

• 3 to 4