FRACTIONS

[dontnou]

3/5=?/10 1/3=5/? 7/8=?/16 7/10=?/50 1/2=6/? 3/4=?/16 5/6=20/? 9/50=?/100 sorry but I dont know fractions,please can someone help me out with my grandaughters home work,very many thanks.

[mickrog]

6 15 14 35 12 12 24 18

[Dodger666]

6/10; 5/15; 14/16; 35/50; 6/12; 12/16; 20/24; 45/50.

[flicrat]

6/10, 5/15, 14/16 35/50 3/6 12/16 ? 18/100 I expect someone cold tell you a rule to follow.

[Dodger666]

Sorry last one should be 18/100.

[kettledrum]

You might enjoy learning how to do fractions with your granddaughter.

Take the 2nd question: 1/3 = 5/?

Take 5 small things (buttons or something) and put them in a pile. That will represent 1/3 or one 'third'. Make 2 more piles each of 5 things so that you now have 3 individual thirds. So how many things have you got altogether (which is number you are looking for) when 5 = one third ?

[mickrog]

think your last one is wrong dodger

[WyeDyed]

For the first one:
3 over 5 = something over 10
10=2*5
so you have doubled the bottom number.
Basic rule: What you do to the bottom number you must do to the top number.
So: 3/5 = 6/10

The Second one:
1 over 3 = 5 over something:
The top number has been multiplied by 5 so you do this to the bottom number:
1/3 = 5/15

Hope this helps, rather than just copy the answers.

[Dodger666]

"think your last one is wrong dodger"

I did correct it later. It's been many years since I did fractions

[carrot99]

3/5 = 6/10 ie you multiplied the bottom 5 by 2 to get 10 so you multiply the top 3 by 2 to get 6

1/3 = 5/15 so you multiplied the top 1 by 5 to get 5 so you multiply the bottom 3 by 5 to get 15

7/8 = 14/16 so 8 x 2 at the bottom to get 16 so 7x2 at the top gives 14

so you treat the top and bottom of the first fraction the same to get the second fraction

[flicrat]

Hooray WyeDyed and Carrots99. I knew someone would be able to explain the principle of it all. I know what to do but found it hard to identify a rule.
Thanks.