Fractions Decimals and Percentages
30 free practice questions with explanations
PassNova has 30 free KS2 SATs Maths practice questions on Fractions Decimals and Percentages, each with a clear explanation. Practise them in the browser with instant feedback — 100% free, no sign-up, on any device. Updated for 2026.
Fractions Decimals and Percentages: example questions & answers
30 worked examples with answers and explanations below. Practise them in the browser with instant feedback on every answer.
What is 1/2 of 20?
- A5
- B10✓
- C15
- D20
Answer: 1/2 of 20 means half of 20, which is 20 ÷ 2 = 10.
What is 1/4 of 12?
- A3✓
- B4
- C6
- D12
Answer: 1/4 of 12 means a quarter of 12, which is 12 ÷ 4 = 3.
Which fraction is the biggest?
- A1/2✓
- B1/5
- C1/4
- D1/3
Answer: When the numerators are the same, the fraction with the smallest denominator is the biggest. 1/2 > 1/3 > 1/4 > 1/5.
What is 0.5 as a fraction?
- A2/3
- B1/3
- C1/4
- D1/2✓
Answer: 0.5 equals 1/2 (one half).
What is 25% of 40?
- A5
- B10✓
- C15
- D20
Answer: 25% means 1/4. 1/4 of 40 = 40 ÷ 4 = 10.
What is 3/4 of 12?
- A6
- B8
- C9✓
- D10
Answer: 3/4 of 12 = 3 × (12 ÷ 4) = 3 × 3 = 9.
Which decimal is equivalent to 1/4?
- A0.25✓
- B0.40
- C0.50
- D0.75
Answer: 1/4 = 0.25 (25/100).
What is 50% of 80?
- A30
- B40✓
- C50
- D60
Answer: 50% is the same as 1/2. Half of 80 is 40.
A pizza is cut into 8 equal slices. Tom eats 2 slices. What fraction of the pizza does Tom eat?
- A1/4✓
- B1/3
- C1/2
- D3/4
Answer: Tom eats 2 out of 8 slices. 2/8 = 1/4.
What is 10% of 50?
- A2
- B5✓
- C10
- D25
Answer: 10% = 1/10. 1/10 of 50 = 50 ÷ 10 = 5.
Which is bigger: 0.6 or 0.65?
- A0.65✓
- B0.6
- CCannot be compared
- DThey are equal
Answer: 0.65 > 0.6 because 0.65 = 0.60 + 0.05.
What is 2/5 of 25?
- A5
- B10✓
- C15
- D20
Answer: 2/5 of 25 = 2 × (25 ÷ 5) = 2 × 5 = 10.
A shop has 100 items. 30% are red. How many red items are there?
- A20
- B25
- C30✓
- D35
Answer: 30% of 100 = 30/100 × 100 = 30 items.
What is 3/10 as a decimal?
- A0.33
- B3.0
- C0.03
- D0.3✓
Answer: 3/10 = 0.3.
A class has 20 pupils. 3/4 of them like maths. How many pupils like maths?
- A10
- B12
- C15✓
- D18
Answer: 3/4 of 20 = 3 × (20 ÷ 4) = 3 × 5 = 15 pupils.
What is 1/4 of 36?
- A6
- B9✓
- C12
- D18
Answer: 1/4 of 36 = 36 ÷ 4 = 9.
What is 3/5 of 50?
- A15
- B20
- C25
- D30✓
Answer: 3/5 of 50 = (3 × 50) ÷ 5 = 150 ÷ 5 = 30.
What is 25% of 80?
- A15
- B20✓
- C25
- D30
Answer: 25% of 80 = (1/4) × 80 = 20.
Which fraction is equivalent to 0.5?
- A1/2✓
- B1/3
- C2/3
- D1/4
Answer: 0.5 = 5/10 = 1/2.
What is 50% of 124?
- A60
- B62✓
- C64
- D65
Answer: 50% of 124 = (1/2) × 124 = 62.
Add 1/4 + 1/2
- A2/4
- B2/6
- C3/4✓
- D1/6
Answer: 1/4 + 1/2 = 1/4 + 2/4 = 3/4.
What is 10% of 250?
- A20
- B25✓
- C30
- D35
Answer: 10% of 250 = 250 ÷ 10 = 25.
A pizza is cut into 8 equal slices. You eat 3 slices. What fraction of the pizza remains?
- A5/8✓
- B3/8
- C6/8
- D4/8
Answer: If you eat 3 out of 8 slices, 8 - 3 = 5 slices remain, which is 5/8 of the pizza.
What is 3/4 as a percentage?
- A70%
- B60%
- C75%✓
- D80%
Answer: 3/4 = 0.75 = 75%.
Subtract 1/3 from 5/6. Give your answer in its simplest form.
- A1/3
- B1/2✓
- C1/6
- D2/3
Answer: 5/6 - 1/3 = 5/6 - 2/6 = 3/6, which simplifies to 1/2.
What is 15% of 200?
- A25
- B30✓
- C35
- D40
Answer: 15% of 200 = (15/100) × 200 = 30.
A shirt costs £40. It is reduced by 20%. What is the new price?
- A£34
- B£30
- C£36
- D£32✓
Answer: 20% of £40 = £8. New price = £40 - £8 = £32.
What is 2/3 of 27?
- A18✓
- B15
- C12
- D9
Answer: 2/3 of 27 = (2 × 27) ÷ 3 = 54 ÷ 3 = 18.
Which is larger: 0.4 or 2/5?
- ACannot be compared
- B2/5
- CThey are equal✓
- D0.4
Answer: 0.4 = 4/10 = 2/5, so they are equal.
What is 1/5 + 1/10?
- A2/15
- B2/10
- C3/10✓
- D1/15
Answer: 1/5 + 1/10 = 2/10 + 1/10 = 3/10.