Maths
>
KS3
>
Numbers
>
How would ...
3 years ago
·
26 Replies
·
4758 views
Abdullah Conn
26 Answers
Primary Teacher (BA Hons, PGCE) English , Maths and English
10% of 500p= 50p
5% of 500p= 25p
15% of 500p = 50p +25p = 75p
That would be my mental method
Written Method
I'm available for 1:1 private online tuition!
Click here to view my profile and arrange a free introduction.Primary Teacher with 15 years teaching experience. 11+ tuition.
5 divided by 100 is 0.05. Multiply this by 15 which is 0.75 or 75p!
I'm available for 1:1 private online tuition!
Click here to view my profile and arrange a free introduction.Hi Abdullah, if we use a non calculator method It might be easier to change £5 to pence £5 = 500 pence then calculate 15%.
15% = 10% +5% so find 10% and 5% separately and add the results to give you 15%.
10% = Divide the number by ten and since 5% is half 10% to find 5% half 10%
10% of 500 p 500/ 10 = 50 p
5% of 500 p 50/2 = 25 p
15% = 50 p+25p = 75 p
Find 10% of £5 which is 0.5 and half that to get 5% which is 0.25 and both answers together which is 0.75.
£5 is equal to 100%, therefore if you are to divide it by 10 you can find 10% (as 10 x 10 = 100)
10%= £5/10=£0.50
As 5% will be half of 10%, you can divide £0.50 by 2 to get 5% which is £0.25
15% is equal to the sum of the 10% and 5% you have already found, £0.50 + £0.25 = £0.75
Therefore 15% of £5 is equal to £0.75
Hi Abdullah,
This is how I would approach the question.
First I would find out 10% of £5 which would be 50p as when you work out 10% you divide £5 by 10.
I have left to work out 5% which will be half the value of 10%. As 10% is 50p 5% would be 25p.
I now have both 10% and 5% which when added together gives you 15%.
Thus, 50p + 25p = 75p
So 15% of £5 is 75p
To work out 15% of £5, it would be easier to work out 10% and then 5% and then add the two together.
So,
10% of £5 = 0.50p and
1% of £5 = 0.05p therefore
5% of £5 = 0.05 x 5 = 0.25p
0.50p + 0.25p = 0.75p
The answer is 75p
First, divide £5 by 10 to find 10% of £5 - which is £0.5 or 50p. Then, divide this by 2 to find 5% of the original, which is 25p.
Add the 10% and 5% together to find 15% - 75p!
5.00 divided by 100=0.05
1%= 0.05
15%= 15 x 0.05=0.75
=75p
6yrs English tutor (TEFL, AQA examiner, SEND trained)
1 reviews
Hi Abdullah, first you would find 10% which you can find by dividing the number by 10. 10% of £5 would be 50p. Next you would find 5% which is half of 10%, this would be 25p. To get 15%, you would need to add these two numbers together: 75p
I'm available for 1:1 private online tuition!
Click here to view my profile and arrange a free introduction.GCSE / National 5 Maths, Edexcel, AQA, SQA. Qualified Head of Maths
3 reviews
If you have a calculator, multiply 5 by 0.15 (as 0.15 is the same as 15%) = 0.75
Without a calculator, find 10% by dividing by 10 (=0.50), and 5% by dividing that by 2 (=0.25), then add together = 0.75
I'm available for 1:1 private online tuition!
Click here to view my profile and arrange a free introduction.Firstly we can work out 10% of £5. This would be 50p. We have taken £5.00 and moved the decimal place forward by one digit. We then work out half of this 10% (50p) which would be 25p. We can add our 10% and 5% together now to reach a total of 15%. 50p + 25p is 75p. So 75p is our answer!
step 1: 100% = £5 so dividing it by 100 gives us 1%
5 ÷ 100 = 0.05
step 2: multiply the answer by the percentage we wish to find 1% x 15 = 15%
0.05 x 15 = 0.75
15% of £5 = £0.75
Find 10% by dividing £5 by 10 = £0.50
Find 5% by dividing our 10% £0.50 by 2 = £0.25
Add £0.50 and £0.25 = £0.75 or 75p
Head of Maths & Examiner. Research led teaching. Evidence in results.
1 reviews
First find 10% of 5 = 5/10 = 0.5
Then find 5% of 5 = 0.25
Then add up both to get final answer = 0.5 + 0.25 = 0.75
I'm available for 1:1 private online tuition!
Click here to view my profile and arrange a free introduction.Think you can help?
Get started with a free online introductions with an experienced and qualified online tutor on Sherpa.
Find a KS3 Maths Tutor