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# MATHS 1-9 What have i done wrong? watch

1. (Original post by stoyfan)
Isn't it
30/80*100

To work out 8 percent of 30 blue counters

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2. (Original post by z_o_e)
Isn't it
30/80*100

To work out 8 percent of 30 blue counters

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No, it asks for 80% of blue counters and what you did was to find the percentage of something.

It asks for the number of blue counters, not percentage which is what you are doing.

80% means 80/100 which is simplified to 4/5. Therefore you need to find 4/5 of the blue counters (30) which is 24.

Because it asks for how many blue counters are left you do 30-24 because 4/5 of blue counters (24) are taken away from the bag.
3. (Original post by stoyfan)
Sorry, I made a mistake. I can see why you are highlighting stuff but don't just highlight the numbers, also highlight helpful verbs and nouns like "take" and "blue counter" or "red counter".

For example what happened was that I was only drawn to the words that you highlighted, like 80% but I didn't I didn't look at the word "taken". Therefore I didn't take 24 for 30.

I think that you can prevent these mistakes from better highlighting. .
Thank you

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4. (Original post by stoyfan)
No, it asks for 80% of blue counters and what you did was to find the percentage of something.

It asks for the number of blue counters, not percentage which is what you are doing.

80% means 80/100 which is simplified to 4/5. Therefore you need to find 4/5 of the blue counters (30) which is 24.

Because it asks for how many blue counters are left you do 30-24 because 4/5 of blue counters (24) are taken away from the bag.
I got the final answer as 10:1

Thank you so much

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5. Can someone please break this question down.

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Attached Images

6. (Original post by z_o_e)
Can someone please break this question down.

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So you know that Colin get 3/10 of the money.-30 percent
This means that Emma and Dave get 7/10 of the money- 70 percent.
You now have to put 70 in the ratio 3:2 to find Dave's share.
EDIT: The 3:2 ratio cannot equal 5/10, because then it wouldnt add up to equal 1. (3/10+5/10=8/10)
7. (Original post by LifeIsFine)
So you know that Colin get 3/10 of the money.-30 percent
This means that Emma and Dave get 7/10 of the money- 70 percent.
You now have to put 70 in the ratio 3:2 to find Dave's share.
EDIT: The 3:2 ratio cannot equal 5/10, because then it wouldnt add up to equal 1. (3/10+5/10=8/10)
So 3+2= 5
70/5= 14

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8. (Original post by z_o_e)
So 3+2= 5
70/5= 14

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This is correct, but not the entire answer. 14 is one part of the ratio, how many parts does Dave have?
Following from this, what is Dave's share of the money?
Spoiler:
Show

HINT: Multiply the number of parts Dave has by 14 to get your answer.
9. (Original post by LifeIsFine)
This is correct, but not the entire answer. 14 is one part of the ratio, how many parts does Dave have?
Following from this, what is Dave's share of the money?
Spoiler:
Show

HINT: Multiply the number of parts Dave has by 14 to get your answer.
1 part equals £14

Therefore Dave is 2*14 which is £28

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10. (Original post by z_o_e)
1 part equals £14

Therefore Dave is 2*14 which is £28

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Nice, you've basically got the answer but there is a small mistake.
The question doesn't say how much money there is, so 1 part is not £14 but 14%.
11. (Original post by LifeIsFine)
Nice, you've basically got the answer but there is a small mistake.
The question doesn't say how much money there is, so 1 part is not £14 but 14%.
Ohhh THANK YOU SO MUCH

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12. (Original post by z_o_e)
Ohhh THANK YOU SO MUCH

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No problem!

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