Maths

What a wonderful thread (I mean it).

The bottom number (denominator) is how many parts the whole is divided into
Ie
1/2 = divided into
1/3 = divided into 3
1/4 = divided into 4.

The top number (numerator) is how many parts you have.

So

If a pizza is cut into 6 slices, it has been cut into sixths. If you eat one slice, you have eaten 1/6. If you eat 2 slices, you have eaten 2/6.

If you eat the whole thing, you have eaten 6/6, which is the same as a whole, and you probably need to stay off the pizza for a week.

1/3 means One part out of three parts.
It could be sisters, one sister out of three.
It could be pairs of socks, one pair out of three.
Indeed it could be pizza or cake.

I remember DD struggling with fractions at GCSE time.

In a fraction such as 1/4, the number at the bottom is the number of equal parts you have divided something in to, and the number at the top is how many of these parts you actually have.

So if you divide a cake into 4 equal parts, so that each part is the same size and weight, each of those parts is called a quarter, expressed as 1/4 - one of the four parts.

If you have two of those parts you have two quarters, expressed as 2/4.

Three parts is 3/4, and if you have all four parts you have 4/4, or four of the four quarters. 4/4 is the same as 1, because you have one whole cake.

You can divide the cake equally by size or weight, it doesn't matter. And if you were dividing up liquid, say a bottle of coke, you'd divide by centilitres. So if you have a 100cl bottle, each quarter would be 25cl

It's more complicated when numbers don't divide easily eg if the bottle was a 75cl one. Then each quarter would be 18,75cl.

When you divide up a cake or a pizza into 8 equal parts, and you take 2 of those (2/8), you will see if you draw it, or cut an actual cake, that having 2/8 off the cake is actually the same s as having 1/4 of it.

Is 1/3 of a cake the same as 1/3 of a pizza if you want 1/3?

My examples assumed someone wanted a 1/3 (one third) of a cake by weight and of a pizza by dimension but both could be divided on the basis of weight or dimension. It depends on what the intention is.

If you had 6 apples one third of their total number is 6÷3=2.

If you needed to know one third of their total weight, say for a recipe, you would weigh them , say 90g in total. One third of their weight is 30g.

Sorry the link was rubbish

Khan academy is really good at explaining concepts in maths.

Try looking at an image. It really helps sometimes to make sense of it. Some people (like me!) are visual learners so trying to unravel concepts can be made much easier if it's drawn.

www.google.co.uk/url?sa=i&url=https%3A%2F%2Fwww.amazon.co.uk%2FFraction-Percentages-Decimals-Childrens-Educational%2Fdp%2FB01EW1U3S6&psig=AOvVaw3MbHqPUkrvCPrUfOlRAB-j&ust=1586146623017000&source=images&cd=vfe&ved=0CAIQjRxqFwoTCOip1ea20OgCFQAAAAAdAAAAABAD

Does this help?

I don't want to be rude but asking

Is 1/3 of a cake the same as 1/3 of a pizza if you want 1/3?

does rather show you are struggling.

If you can afford it and if it can be done by Skype or Facetime I think a proper tutor would be a big help.

I'm trying to understand what Dido posted,
Is 1/3 of a cake the same as 1/3 of a pizza if you want 1/3?
It's not about weight or volume

One third of a thing is always that thing's numerical value or weight or volume or size divided by 3.

If a cake weighs 99 grammes 1/3 is 99÷3 =33g

If a pizza were square and measured 30cm by 30cm (900 sq cm) then 1/3 is a slice which is 900 sq cm divided by 3 =300 sq cm measuring say 10 cm by 3 slice

A bottle of wine holds 75cl. 1/3 of the bottle is 75÷3 or 25cl

The 'divide' symbol represents a fraction with dots instead of numbers so 1 divided by 3 is 1/3.

For help with percentages got hold of 100 'things' counters, buttons, paperclips, pennies...

start by dividing them into 1/2, 1/3, etc - 1/3 you will not be able to get an even number.

Percentages are a way to define something as 'out of a hundred'.

If you have a £1 that is the same as 100 pennies. So if you want to divide it by 2 you will have 2 x 50p.

An increase of 10% would be 10p.

There are some great teachers on you tube who explain maths so well.

TheBewildernessisWeetabix's post explains converting fractions to decimals, if that is what you are struggling with. Your post wasn't clear

This might help you get it sorted.
www.mathsisfun.com/converting-fractions-decimals.html

1/3 is one third.

1/3 of 3 is 1
1/3 of 6 is 2
1/3 of 9 is 3
1/3 of 12 is 4
1/3 of 100 is 33 and a third and so on.

It simply means what figure is1/3 (one third) of a specified number. In other words divide any number by 3 - your answer is 1/3 of the original number.

It's exactly the same principle as 1/2 (one half) or 1/4 (one quarter) ad infinitum for every other number