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Junior Cycle · Junior Cycle Maths

Junior Cycle Maths: Fractions, decimals & percentages

How often Fractions, decimals & percentages comes up on the Maths papers, every year it was asked, and questions to try.

HL Asked on 2 of the last 5 Higher Level papers, most recently in 2023.

OL Asked on 3 of the last 5 Ordinary Level papers, most recently in 2024. most years

Fractions, decimals & percentages, Higher Level(9 marks)

Quick ones on Fractions, decimals & percentages.

(a)A club's membership rose from 640 to 720. What is the percentage increase?
  1. 11.1%
  2. 12.5%
  3. 80%
(b)After a 15% rise, a town's population is 4600. What was it before the rise?
  1. 4585
  2. 3910
  3. 4000
(c)The number of fish in a lake falls by 20%, then rises by 20%. What is the overall change?
  1. 4% decrease
  2. 4% increase
  3. No change
Show the answers

(a) 12.5%

(b) 4000

(c) 4% decrease

Your turn: Higher Level questions on Fractions, decimals & percentages.

Higher Level

Asked on 2 of the last 5 Higher Level papers, most recently in 2023.

Every paper, year by year

YearWhere it came up
2026Not asked
2025Not asked
2024Not asked
2023Q2
2022Q6

Links open the State Examinations Commission’s paper for that year.

Ordinary Level

Asked on 3 of the last 5 Ordinary Level papers, most recently in 2024. most years

Every paper, year by year

YearWhere it came up
2026Not asked
2025Not asked
2024Q4
2023Q4
2022Q10

Links open the State Examinations Commission’s paper for that year.

More Fractions, decimals & percentages questions

Fractions, decimals & percentages, 2 marks

Write 3/8 as a decimal.

  1. 0.625
  2. 2.667
  3. 0.375
Show the answer

0.375

A fraction is the top divided by the bottom: 3 ÷ 8 = 0.375. Working out 8 ÷ 3 = 2.667 does it the wrong way round.

Fractions, decimals & percentages, 2 marks

Write 0.6 as a percentage.

  1. 0.6%
  2. 60%
  3. 6%
Show the answer

60%

To change a decimal to a percentage, multiply by 100: 0.6 × 100 = 60%.

Fractions, decimals & percentages, 3 marks

Work out 2/3 + 1/4.

  1. 11/12
  2. 3/7
  3. 3/12
Show the answer

11/12

Use a common denominator of 12: 2/3 = 8/12 and 1/4 = 3/12. So 8/12 + 3/12 = 11/12. Never add the bottom numbers.

Other Maths topics

All of Junior Cycle Maths