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

You are not logged in.

- Topics: Active | Unanswered

**SteveB****Member**- Registered: 2013-03-07
- Posts: 540

Hi Mandy. Happy new year. I will log on to here at 7pm tomorrow. Bye.

*Last edited by SteveB (2014-01-02 04:54:24)*

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 888

Hi steveb mandy here thanks you. For the message see you on here at 7pm. Tomorrow night ok

Offline

**SteveB****Member**- Registered: 2013-03-07
- Posts: 540

Okay.

Here is a problem that I have just made up which brings together percentages and rounding concepts:

£600 is to be divided as follows:

Abigail is paid 75% of £600

Emma is paid 4% of £600

Michael is paid 2.5% of £600

Daniel is paid 18.5% of £600

How much money in pounds is each person paid ?

Give two reasons why it would not be a good idea to round the

percentages to the nearest whole number before doing the calculation

and give the figures involved in what would happen.

*Last edited by SteveB (2014-01-02 07:26:27)*

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 888

hi steveb when you are on here at 7.00pm tonight can you show me how to do percentage please as i have for got ok? see you at 7.00pm ok/

Offline

**SteveB****Member**- Registered: 2013-03-07
- Posts: 540

Are you able to do a problem like the one in my previous post, or is that one too difficult for you at the moment ?

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 888

Hi steveb mandy here can we have a go at this tonight together please

Offline

**SteveB****Member**- Registered: 2013-03-07
- Posts: 540

A good place to start would be to convert the percentages into a decimal format.

So what is 75% as a decimal ?

(75/100) = 0.75

....

Now what can you do with that result using a calculator to help?

*Last edited by SteveB (2014-01-03 07:02:50)*

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 888

hi steveb is it 7.5 then

Offline

**SteveB****Member**- Registered: 2013-03-07
- Posts: 540

No that is not what I meant. 0.75 is what I am calling 75% in decimal format.

Now we need to work out 75% of £600.

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 888

what do i do then

Offline

**SteveB****Member**- Registered: 2013-03-07
- Posts: 540

Do this on your calculator:

0.75 x 600 = .....

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 888

0.75 x 600 = 450 now what

Offline

**SteveB****Member**- Registered: 2013-03-07
- Posts: 540

Now what is 4% of £600 ?

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 888

0.4 x 600 = 240

Offline

**SteveB****Member**- Registered: 2013-03-07
- Posts: 540

I am afraid that is not quite right.

4% is not 0.4 it is 0.04

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 888

2.5 x 600 =1500

Offline

**SteveB****Member**- Registered: 2013-03-07
- Posts: 540

No 2.5 % is 0.025 not 2.5

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 888

what am i doing wrong then

Offline

**SteveB****Member**- Registered: 2013-03-07
- Posts: 540

With the 4% of 600 one you should have done this:

0.04 x 600 = .....

You did:

0.4 x 600 = .....

Offline

**SteveB****Member**- Registered: 2013-03-07
- Posts: 540

With the 2.5 % of 600 you did:

2.5 x 600 = 1500

It was supposed to be:

0.025 x 600 = 15

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 888

0.04 x 600 = 24

Offline

**SteveB****Member**- Registered: 2013-03-07
- Posts: 540

What is 18.5% of £600 ?

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 888

0.025 x 600 = 15

0.185 x 600 = 111

Offline

**SteveB****Member**- Registered: 2013-03-07
- Posts: 540

Good right so can you gather those answers together to answer the first part of the question:

Abigail is paid 75% of £600

Emma is paid 4% of £600

Michael is paid 2.5% of £600

Daniel is paid 18.5% of £600

How much money in pounds is each person paid ?

Offline

**mandy jane****Member**- Registered: 2010-09-23
- Posts: 888

abigail is paid £450

emma is paid £24

michael is paid £15

daniel is paid £111

am i right

Offline