confused

[sunflower68]

Hi there, me and my poor litte 10 year old are stuck. He has to find 18% of 35. I don't want to show him the wrong way but I thought as 1% is 3.5 you would multiply 3.5 by 18. Easier said than done as the 'chunking method of division' I learnt last week. How can I multiply these two this way or is there a simpler method . tyia

[ironmonger]

3.5 iis 10%

[sb23]

Er, 1% of 35 is 0.35 not 3.5

That should help

[1955]

Surely 1% is 0.35
20% of 35 is 7
7 - 0.70 = 18%
The answer 6.30
(I'm useless at maths by the way)

[sunflower68]

durrr thanks a lot I see my error.� How can I put this sum into simple terms for a 10 year old?� Thanks for all your help. Sorry 1955 I thought I was ok at maths but I don't get how you got your answer!

[hellywelly4]

If you divide 35 by 100, then multiply the answer by 18. That's the way I way taught, and you show it as a fraction - 35/100 x 18/1
I think!! It's a very long time since I was a school.

[FoxLee2]

Re 1955's answer - if you know what 20% of the number is and you also know what 1% is - take away 1% twice and that will leave you with 18%.

This may be a silly question but why are YOU having to teach your son percentages - why isn't he learning about them at school?

[sunflower68]

thanks all for your replies they are really useful.
Fox Lee in reply to your question, maths is not his best subject and he is quite shy. He doesn't always like to say in class when he is stuck. When he comes home with stuff he finds hard I like to help; it's what mums do. I am sure you would do the same .