Ratio (P5) Practice
Master simplifying ratios, finding unknown quantities using the unitary method, and solving real-world ratio word problems. Ratio is the backbone of P6 problem solving — build it strong here.
Common Mistakes to Avoid
Not simplifying the ratio to its lowest terms
Confusing the part-part ratio with the part-whole fraction
Losing track of which 'unit' represents which quantity
Practice Questions
Try each question. When you're stuck, reveal the Socratic strategy — a guided hint that teaches you how to think, not just what to write.
The ratio of red to blue marbles is 3:5. There are 40 marbles altogether. How many red marbles are there?
Simplify the ratio 24:36:60 to its lowest terms.
Ali and Ben share $200 in the ratio 3:2. How much more money does Ali have than Ben?
Parent & Tutor Insight
Ratio is one of the most conceptually rich topics in primary math. When your child is stuck, encourage them to draw a model showing the ratio units — even a quick sketch dramatically reduces errors.
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Common Questions
How is ratio different from a fraction?
A ratio (e.g. 3:5) compares two or more quantities to each other (part-to-part). A fraction (e.g. 3/8) compares one part to the whole. If the ratio of boys to girls is 3:5, then boys are 3/8 of the total — not 3/5.
Why is ratio so hard for P5 students?
Most students were introduced to fractions before ratios, so they instinctively use the denominator wrong. Explicitly drawing the 'units' (bar model boxes) for each part of the ratio helps students see the relationship clearly.
Will my child see 3-term ratios in P5?
Yes — the P5 syllabus includes 3-term ratios (e.g. A:B:C = 2:3:4). These are often tested in problem sums and require students to express any part as a fraction of the total.