quizplain3/4
What is 3/4 of 20?
Why this answer?
First divide 20 by 4 to get 5. Then take 3 of those parts: 3 × 5 = 15.
Maths quiz: fractions, percentages and ratios
Five maths questions with worked answers on fractions, percentages and ratios. Use them for practice or a short knowledge check.
How to use this example
Understand reasoning and misconceptions. Ask learners to explain their method; the correct answer alone is not enough.
- Let learners calculate independently, on paper if helpful. The timer is off.
- Ask how they found each answer. Discuss a common mistake as well.
- Adapt the difficulty to your group and use the responses to choose a follow-up exercise.
Questions, answers and explanations
A book costs €40 with a 25% discount. How much do you pay?
Why this answer?
25% is one quarter. A quarter of €40 is a €10 discount. The new price is €40 − €10 = €30. The discount and the final price are different amounts.
You need 300 grams of pasta for 4 people. How much for 6 people?
Why this answer?
Each person needs 300 ÷ 4 = 75 grams. For 6 people, use 6 × 75 = 450 grams, keeping the portion size the same.
Which value is equal to 0.6?
Why this answer?
Multiply a decimal by 100 to express it as a percentage: 0.6 × 100% = 60%.
What is 2/3 + 1/6?
Why this answer?
Use a common denominator: 2/3 = 4/6. Then 4/6 + 1/6 = 5/6. Add the numerators, not the denominators.