Percentages and fractions arrive properly in Year 5, and they arrive together. For a lot of children this is the first point in primary maths where the ground shifts — up to now, numbers have mostly counted things. A fraction does not count anything. It describes a relationship, and that is a different kind of idea.
It is also the point at which some very capable children start to say they are not good at maths. Almost always, what has happened is that they were taught a procedure before they were given a picture, and the procedure had nothing underneath it to hold on to.
Why Year 5 is the year that matters
Year 5 is where fractions stop being about halves and quarters of a pizza and start being about equivalence, comparison and operation. Children are expected to add fractions with different denominators, convert between fractions, decimals and percentages, and find fractions and percentages of quantities.
Each of those depends on one underlying idea: that a fraction is a relationship between a part and a whole, and that the same relationship can be written several different ways. A child who has that idea finds the rest reasonable. A child who does not is memorising an expanding list of unconnected steps, and the list will eventually outgrow their memory.
The timing matters for a second reason. For families preparing for 11+, Year 5 is the year the groundwork is laid, and fractions, decimals and percentages are among the most heavily tested topics on every major 11+ format.
One idea, three notations
The single most valuable thing a Year 5 pupil can understand is that a half, 0.5 and 50% are not three topics. They are three ways of writing the same relationship, chosen for convenience.
Once that lands, a whole class of questions becomes easier. Finding 25% of a number stops being a percentage procedure and becomes “a quarter of it”. Comparing 3/5 with 62% stops requiring a conversion rule and becomes a matter of putting both in whichever form is quickest. Children who hold the three notations together are doing markedly less work than children who hold them apart.
Getting there is mostly a matter of representation. When a child can see a quantity divided into equal parts, and can see that shading two of five parts is the same shape of fact as shading forty of a hundred, the equivalence is not something they have to be told.
Where bar modelling earns its keep
This is the stage at which bar modelling becomes genuinely powerful rather than merely tidy.
Consider a typical Year 5 problem: a child spends 2/5 of their money and has £18 left. How much did they start with? Approached as an equation this is fiddly for a ten-year-old. Drawn as a bar of five equal parts with two crossed out, it is almost self-solving — three parts are £18, so one part is £6, so the whole is £30. The child has not been taught a rule. They have looked at a picture and read the arithmetic off it.
Percentages behave the same way, with the bar divided into a hundred rather than five. The technique carries a long way: the same drawing that solves this problem in Year 5 solves ratio problems in Year 8 and proportional reasoning at GCSE. If it is new to you, our guide on how to teach bar model at home walks through it step by step.
What to do at home
Three things are worth more than a workbook.
Ask for the picture before the answer. When your child is stuck, resist explaining the method. Ask them to draw what the question is describing. Much of the time the drawing resolves it, and the habit is worth more than the individual answer.
Move between notations deliberately. When a fraction comes up, ask what it is as a decimal and as a percentage. Thirty seconds, done regularly, builds the flexibility that formal practice tends not to.
Use the percentages that are already around you. Sale signs, battery indicators, test scores — all of them are percentage questions with the context already supplied. “What fraction is that?” is a complete maths exercise and takes no preparation at all.
Signs the understanding is not yet secure
A child who can add fractions correctly but cannot say why the denominators need to match is following a rule rather than an idea. So is a child who converts fractions to percentages accurately but is surprised when the two turn out to be equal. Neither is cause for concern in itself, but both are worth addressing now — in Year 5 it is a short conversation, and by Year 8 it has become an obstacle.
How we teach it
Our Year 5 pupils work in small groups of around 4–5 with qualified teachers trained in the UK or Singapore, in an online classroom where every child has their own whiteboard. That last detail matters more than it sounds: with fractions, the working shows the misconception far more clearly than the answer does, and a teacher who can see the working as it happens can correct the thinking rather than the result.
Fractions and percentages sit at the centre of our 11+ maths tuition, and fit alongside the wider preparation set out in our Year 5 practice timetable. You can see the method at work in the video solutions on our YouTube channel.
If you would like to know where your child stands before Year 6, our free 11+ baseline assessments give you a clear picture at no cost — or book a free consultation call and we will go through it with you.