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You might be wondering what's Ratio and 

Rate, well i am going to show what it's about.

To make it easier to understand, i am going to 

show you what's Ratio and then i will show you 

what's Rate, so it will be clear and easier to 

understand and to see the differences.

 Kate has 5 animals, 2 dogs and 3 rabbits.

If i ask you the rate of rabbits to dogs, what will the ratio 

be? 

TO

The ratio will be 3:2 and that's because they are 

asking us from RABITS TO DOGS. 

If it asks you the ratio of dogs to total of animals, what will 

your answer be??

+

The answer will obviously be 2: 5, because there are 2 

dogs and the total of animals is 5.

Now you kind of get what Ratio is about, there is so much 

more about ratio but today's class is going to be about 

rate, so let's see.

You might be asking yourself what's the differences 

between ratio and rate. Well i will show you.

Rate:A comparison of two quantities with the SAME units. 

Ratio:A comparison of two quantities expressed in 

DIFFERENT units.

The difference will be as i said 

before, Ratio is comparing by using 

SAME units and rate by using 

DIFFERENT units.

I will show you an easy example of Rate.

Brian has his own car and he rides it from his house to his 

job. He rides 240km (kilometers) in 2 hours. How many 

kilometers does he ride in 1 hour?

Application:

It's easy we just have to divide 240 by 2,so we can get the 

kilometers of 1 hour.

240÷2=120

That means that Brian rode 120km(kilometers) in 

1 hour.

As you can see it's not that hard . Now i will give you 

another easy example so that you can get it better.

In the shop Maria buys 3 milk for $450. How much did she 

pay for each of them?

+

+

= $4.50

How much will it be for each one?

We have to do the same thing we did before, we have to 

divide   $4.50 by 3.

450÷3=3.15

= $3.15 for 1

Knowledge:

Now, let's make it a little bit harder. I will show you another 

example,but this time it's gonna be a real life situation.

Don't worry, it's not as hard as you think 

Let's talk about the rice from Hong Kong and 

comparing it to the rice selling of Peru.

Hong Kong:2k is about $33.95

                            5k is about $61.90

Peru:2k will be about $ 6.00

         5k will be about $15

Now that we know what price of each rice selling from Hong 

Kong and Peru let's compare them together.

If you look at it carefully you can see that if we compare the 

rice selling of 2k from Peru and Hong Kong we can say that in 

Peru is cheaper and that goes as well for 5k. 

Our conclusion could be that the rice selling form these two 

countries, Peru is selling are cheaper for rice.

Thinking/Inquiry/Problem Solving

Let's see what if the rice from Peru change and are 

the opposite, the what will our conclusion will be 

now?

(this is not a real situation, just another example)

Hong Kong: 1k will be about $15.35

                  3k will be about $40.50

Peru: 1k will be about $3.00

         3k will be about $9.00

Here we can still see that peru has a cheaper 

selling, but what if the question is asking you 

which one has the expensive selling, what will your 

answer be this time?

The answer will be Hong Kong and our conclusion 

will be that Hong kong has the expensive selling if 

we compare it with Peru.

Communication:

Well i was trying to show you what rate is by using a real 

life situation. In short word rate is about comparing prices 

or other things between things or subjects.

I hope it help, so have fun with math!!! 

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