# RatiosWatch

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#1
I have a Key Stage 3 book, yet it doesn't tell me anything about how to work out Ratios..

The ratio of weight of Andy to Jan is 7:5. Jan has a weight of 95kg, how much does Andy weigh?

In a recipe the ratio of flour to butter is 2:3. How much flower is needed to mix with 240g of butter?

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5 years ago
#2
(Original post by fliss1992)
I have a Key Stage 3 book, yet it doesn't tell me anything about how to work out Ratios..

The ratio of weight of Andy to Jan is 7:5. Jan has a weight of 95kg, how much does Andy weigh?
A:J = 7:5

Every 7 kg Andy weighs means that Jan weighs 5kg

So if Andy weighed 42kg (6x7)
Then Jo would weigh 30kg (5x5)
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#3
I'm still confused
0
5 years ago
#4
(Original post by fliss1992)
I have a Key Stage 3 book, yet it doesn't tell me anything about how to work out Ratios..

The ratio of weight of Andy to Jan is 7:5. Jan has a weight of 95kg, how much does Andy weigh?

In a recipe the ratio of flour to butter is 2:3. How much flower is needed to mix with 240g of butter?

A:J
7:5
?:95

5 x 19 = 95

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#5
but where do you get the 19 from?
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5 years ago
#6
(Original post by fliss1992)
but where do you get the 19 from?
95 / 5

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0
5 years ago
#7
(Original post by fliss1992)
but where do you get the 19 from?
A:J
7:5
?:65

Just to see if you get it. What would be andy here? What you do to one side, you do to the other

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0
#8
0
5 years ago
#9
(Original post by fliss1992)
Nope. You are using the 19 from the last question.... Its not 19 anymore.

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0
5 years ago
#10
(Original post by fliss1992)
I have a Key Stage 3 book, yet it doesn't tell me anything about how to work out Ratios..

The ratio of weight of Andy to Jan is 7:5. Jan has a weight of 95kg, how much does Andy weigh?

In a recipe the ratio of flour to butter is 2:3. How much flower is needed to mix with 240g of butter?

Eg ..
Flour: Butter
2:3
?:240g

240/3 = 80 ( =1)
So to get 2 .. 2 x 80 =160
160:240

I Hope this helps
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5 years ago
#11
When you know the amount of one of the ratios, divide it by the ratio number given to find 1. Then multiply the answer by the other ratio amount.
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#12
5 x 19 = 95

you said here do 5 x 19 = 95

so what is it...
0
5 years ago
#13
(Original post by fliss1992)
5 x 19 = 95

you said here do 5 x 19 = 95

so what is it...
In my new question, I put 65, not 95.

A:J
7:5
?:65

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0
5 years ago
#14
(Original post by fliss1992)
5 x 19 = 95

you said here do 5 x 19 = 95

so what is it...
133 is correct
0
5 years ago
#15
(Original post by fliss1992)
5 x 19 = 95

you said here do 5 x 19 = 95

so what is it...
Sorry, for your original question. 133 is correcr

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#16
Thanks
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#17
I have another ratio question..

Split 500m in the ratio 1:4

& another

Split 4.8kg in the ratio 1:5

Do I work these out the same as the one before?
0
5 years ago
#18
(Original post by fliss1992)
I have another ratio question..

Split 500m in the ratio 1:4

& another

Split 4.8kg in the ratio 1:5

Do I work these out the same as the one before?
First one:

Add the parts of the ratio

1 + 4 = 5 parts

Divide 500 m by 5 (the number of parts)

1 part is 100 m

If 1 part is 100 m how big is 4 parts?
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#19
(Original post by Mr M)
First one:

Add the parts of the ratio

1 + 4 = 5 parts

Divide 500 m by 5 (the number of parts)

1 part is 100 m

If 1 part is 100 m how big is 4 parts?
well 400 m would be four parts?
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#20
[QUOTE=fliss1992;45955219]I have another ratio question..

Split 4.8kg in the ratio 1:5

would the answer to this be 4kg?
0
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