7.1 What is Ratio?

7.1. What is
Ratio?

Chapter 7: Ratio and Proportion

​Student learning Objectives

At the end of this handout, we expect student to:
1. Understand the concept of ratio.
2. Able to solve a simple problem using concept of ratio of numbers

​Student learning Objectives

In general, in this chapter we will discuss about, at least, 3 of these!

​The Definition

What is Ratio?

Important!!!

Introduction to Ratio

​Let's watch the video!

Open Ended

Please, re-explain with your own word what is the definition of ratio?

Ratio is just like a fraction!

Open Ended

Please, re-explain how to simplified a ratio?

Important!!!

​Example 1

Solution 1

Solution 1

Example and Solution 2

Drag and Drop

If the cost of 6 cans of juice is ₹ 210, then what is the cost of 4 cans of juice?_​

Placeholder

Drag these tiles and drop them in the correct blank above

₹140

₹ 120

₹ 100

₹ 80

Multiple Choice

If 8 cats, 12 dogs and 3 rabbits are in a store of pet animals, then the ratio 8 : 23 is for ..................

• dogs to cats

• cats to dogs

• rabbits to cats

• cats to all animals

Ratio: Parts and wholes

​Let's watch the video!

Open Ended

Please, re-explain with your own word what did you get from the video?

Math Response

An 8-inch-long submarine sandwich is cut into two pieces whose lengths are in the ratio of 7 to 5. How long is the shorter piece?

Type answer here

Correct Answer: \frac{10}{3}

Deg^°

Rad

Math Response

A bookcase has 3 shelves with a total of 24 books. The top shelf has 8 mystery books. The middle shelf has 10 math books. The bottom shelf has 6 science books. Two books are now taken off each shelf. What fraction of the books remaining on the three shelves are math books?

Type answer here

Correct Answer: \frac{4}{9}

Deg^°

Rad

Open Ended

So, now. Do you understand what is the concept of ratio?

Open Ended

And, now. Can you simplify ratio of numbers?

Open Ended

So, do you find any difficulties when solving problems using the concept of ratio? If yes, describe it!