Intro to Ratios

What is a Ratio?

• It's a comparison of two things

• Multiplying two fractions 

• A number over another number

• Two decimals that can be multiplied

A class has 15 boys and 20 girls. What is the boy:girl ratio in simplest form?

• 4 to 5

• 10 to 13

• 3:4

• 3:5

A bag of marbles comes with 3 blue marbles, 2 red marbles, and 5 yellow marbles. What is the ratio of red to total?

• 2 : 5

• 1 : 5

• 1 : 4

• 5 : 1

• 4 : 1

A ratio can be written as all the ways below EXCEPT which one?

• 3=4

• 3:4

• 3/4

• 3 to 4

What is a Ratio?

• Is 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

James had 4 peaches, 5 apples, and 2 plums. What is the ratio of apples to plums?

• 5 to 2

• 2:5

• 4/5

• part to whole

If there are 7 girls and 8 boys on the school’s track team, what is the ratio of girls to boys? Write your answer in three different ways.

• 7:8

• 8:7

• 8 to 7

• 7 to 8

If a sports field is 100 meters long and 40 meters wide, what is the ratio of its width to its length? Write your answer in three different ways.

• 100:40

• 40:100

• 40 to 100

• 100 to 40

There are 20 seats and 18 students. What is the ratio of seats to students?

• 20:38

• 20:18

• 18:20

• 18:38

What is a Ratio?

• Is a comparison of two quantities

• To multiply two fractions

• Strictly a fraction

• Two decimals that can be multiplied