How can you tell they’ve got it: Percentages (age 12+)?

If they’ve got it, you’ll see things like: Calculate a 15% increase on £240 using a decimal multiplier (× 1.15); Find the original price before a 20% discount resulted in a sale price of £64; Calculate simple interest on £500 at 3% per annum for 4 years. Or just try it together: If a bike originally costs £250 and its price goes up by 8%, can your child work out the new price — and if a savings account earns 3% simple interest per year, how much interest would £500 earn in 4 years?

Mathematics Ratio & Proportion Ages 12–14

Percentages (age 12+)

Your child can work out a percentage rise or fall, and simple interest. A $250 bike rising 8% costs $270.

In curriculum terms

Solve problems involving percentage increase, percentage decrease, finding the original value after a percentage change, and calculating simple interest

Ages are typical, not deadlines — follow your child’s pace. How to help at home →

How to tell they’ve got it

Tick these off as you see them — no test required.

Calculate a 15% increase on £240 using a decimal multiplier (× 1.15)
Find the original price before a 20% discount resulted in a sale price of £64
Calculate simple interest on £500 at 3% per annum for 4 years

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Try this together

If a bike originally costs £250 and its price goes up by 8%, can your child work out the new price — and if a savings account earns 3% simple interest per year, how much interest would £500 earn in 4 years?

Where this sits on the map

Stuck here? Check the skills it builds on first. Confident? Here’s what it unlocks.

Builds on

Calculating Percentagesages 10–11Percentage increase/decrease extends KS2 percentage calculations

Decimals and fractionsages 10–11Using decimal multipliers for percentage change requires fraction-decimal fluency

Proportional Reasoning Vocabularyages 11–14Percentage increase/decrease problems use 'rate', 'proportion', and 'multiplicative relationship' vocabulary

Percentages (age 12+)this skill · ages 12–14

Unlocks

Pictograms and tally chartsages 11–13Pie chart construction requires calculating percentages/fractions for angle calculation

solid = must come firstdashed = helps

Curriculum alignment

Where this fits in the official school curriculum — our best automated guess, not yet checked by a person.

This skill sits beyond Year 6 in the Australian Curriculum, so no F–6 code is matched. It also sits beyond the NSW K–6 syllabuses. It also sits beyond Level 6 in the Victorian Curriculum.

Nearby on the map

Proportionages 12–14 Ratio Notation and Relationshipsages 12–14 Compound Unitsages 11–14 Dividing Quantities by Ratioages 11–13

All Ratio & Proportion skills →