P6 Forming and simplifying ratios
Today’s problem — free all day, every step. Every day has one.
Simplify the ratio 18 : 24
Reduce 18 : 24 to its simplest form.
Show the answerHide the answer
See all 5 steps
MathBrush is being tested with a few parent groups, and every solution on the site is open to them — one household, all children. If you were given a code, it goes in once and this device remembers it.
I have a code → See a free one like it
65 worked examples are free without a code, two from every pattern. No account, either way.
The pattern behind it: Forming and simplifying ratios
Keep the quantities in order and divide both by the same number.
In this one. Divide both terms by the same number. Using their greatest common factor gives the simplest equivalent ratio.
How to spot it
The question names two quantities in a stated order, red to blue, or gives an existing ratio to reduce. Words like 'ratio' and 'simplest form' give it away.
Common mistake
Children write the numbers in the order they appear in the story rather than the order the question asks for. When simplifying, they divide only one of the two numbers instead of both.
Try one like it
Standard Red and blue beads — 18 and 24 There are 18 red beads and 24 blue beads. Write the ratio of red beads to blue beads.The 33 problem patterns
All 33 patterns, one to a page — the 19 behind Primary 5 and 6 word problems, and the skills the younger years are built on. The bar model, how to spot it in the question, and the mistake children make. A booklet you can print. Free.
A PDF, and a note when new solutions go up.