Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

Is the answer 22.5% then

Am I right I can log on tomorrow at around 7.00pm ok how am I doing then can you let me know please

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,063

Yes 22.5% is right. Which means your final score for the evening is 100%

Well done.

I'll try to log in at 7.00pm, but I am expecting a visitor so I'm not so sure how much time I can give it.

Goodnight.

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

Good night to you to

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

Hi bob buddy mandy here can you leave me some sums to do please and I will be on here tomorrow ok

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,063

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

Hi manfy newland here dose anyone think I should do the gcse maths course with Oxford open leaning or not or no of a better one to do instead if so leave me a message on here

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

Hi bob buddy or anyone my answers are

(1) 1/4 = 1/4 × 10/100 = 10/100 = 10%

(2) 3/4 = 3/4 × 25/100 = 75/100 = 75%

(3) 1/5 = 1/5 × 20/100 = 20=100 = 20%

(4) 3/5

(5) 1/25 = 1/25 × 4/100 = 40/100 = 40%

(6) 188/400 = 188/40000 ÷ 4/100 = 47/100 = 47%

(7) 44/200

(8) 75/300

(9) 380/1000

(10) 45/200

I have done some hope they are right if not show me why they are wrong please?

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,063

hi Mandy

(1) 1/4 = 1/4 × 10/100 = 10/100 = 10%

Not correct. This is what you should have done:

(2) 3/4 = 3/4 × 25/100 = 75/100 = 75%

correct!

(3) 1/5 = 1/5 × 20/100 = 20=100 = 20%

correct!

(4) 3/5

You have done 1/5 correctly. 3/5 will be three times as big.

(5) 1/25 = 1/25 × 4/100 = 40/100 = 40%

Why did you add a zero? 4% was correct.

(6) 188/400 = 188/40000 ÷ 4/100 = 47/100 = 47%

correct!

(7) 44/200

The last four questions are all ones you have met in earlier posts so have a look back.

(8) 75/300

(9) 380/1000

(10) 45/200

Bob

Children are not defined by school ...........The Fonz

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

The answers to

(4) 40%

(8) 25%

(9) 38%

(10) 22.5

Am I right

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,063

8, 9 and 10 are correct. Well done!

Let's work on setting out number 4 properly:

Here is the code to make your answer look like that:

`[math]\frac{3}{5} = \frac{3 \times ??}{5 \times 20} = \frac{**}{100} = **\%[/math]`

So you can copy that and all you have to do is put the right numbers in for the ?? and the **

Good luck.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

[Math]\frac {3} {5}=\frac{3\time15}{5\time20}=\frac {45}{100}=45%[math]

Is this right

*Last edited by mandy jane (2014-08-17 04:22:33)*

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

Why is it not working?

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,063

You have to get the code exactly right. The % sign isn't recognised but \% is.

It should be \times not \time.

And sometimes the spaces matter too. I put a space before and after \times to make that work.

Now to the problem itself.

It is not right yet I'm afraid.

The ?? must be the same as the number below it .... 20

Please try again.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

[Math]\frac {3}{5} = \frac{3 \times 20}{5 \times 20} = \frac {60}{100} = 60\% [/math]

Am I right

*Last edited by mandy jane (2014-08-17 05:24:06)*

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

What am I doing wrong please

*Last edited by mandy jane (2014-08-17 05:23:44)*

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,063

Little m in math please.

This answer is correct. Here's a similar one to try:

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

Ok will have it done by tomorrow ok?

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

*Last edited by mandy jane (2014-08-17 07:29:18)*

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

Hi bob buddy I know how to put the question on here by copy and paste ok am I right can you send me some more please

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,063

`[math]\text{Q11. } \frac{2}{10} = \frac{2 \times ??}{10 \times 10}= \frac{??}{100}= ??[/math]`

`[math]\text{Q12. } \frac{3}{10} = \frac{3 \times ??}{10 \times 10}= \frac{??}{100}= ??[/math]`

`[math]\text{Q13. } \frac{7}{10} = \frac{7 \times ??}{10 \times 10}= \frac{??}{100}= ??[/math]`

`[math]\text{Q14. } \frac{1}{20} = \frac{1 \times ??}{20 \times ??}= \frac{??}{100}= ??[/math]`

`[math]\text{Q15. } \frac{1}{8} = \frac{1 \times ??}{8 \times 12.5}= \frac{??}{100}= ??[/math]`

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

*Last edited by mandy jane (2014-08-18 02:38:02)*

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

Hi bob buddy mandy here I have done questions 11 12 and 13 I am finding 14 and 15 hard can you help me please send message back please

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 1,162

Offline

**bob bundy****Administrator**- Registered: 2010-06-20
- Posts: 8,063

Excellent. These three are all correct.

For Q14 the bottom number (20) must be times by something to make 100.

You can find the number by doing this on a calculator:

Once you have this number, times the top by the same.

For Q15 you can do a similar thing.

So do

Hope that helps.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

Offline