MathematicsRatio & ProportionAges 12–14
Percentages (age 12+)
Solve problems involving percentage increase, percentage decrease, finding the original value after a percentage change, and calculating simple interest
Learning resources
Reviewed external links that reinforce this concept. They do not replace Gakuva’s teaching approach.
No reviewed resources for this concept yet.
The teaching approach above still stands. Curated practice links will appear here as the shelf fills.
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3 before · 1 after
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Before
This concept
Percentages (age 12+)Procedural concept
Check understanding
- 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
“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?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Ratio & Proportion
- Age range
- Ages 12–14
Standards
ccss-math:7.RP.3uk-nc-2013:KS3.Maths.Ratio.8