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Maths

Stretch – Percentage Increase & Decrease

Stretch (universal 11+): increase or decrease an amount by a percentage, and find a percentage change.

MathsAge 11+25 minutes

What this topic covers

  • Increase or decrease an amount by a percentage (find the percentage, then add or subtract).
  • Use a multiplier (× 1.2 for +20%, × 0.85 for −15%).
  • Find the percentage change from an original and a new amount.

Core concept summaries

Key ConceptsIncrease and DecreaseMultipliersPercentage Change; the Wrong-Base Trap

Practice formats pupils may meet

NeurofiED uses varied practice to help pupils apply the idea actively, check understanding and build confidence over time.

clozematchingquiz

Example quiz question

Increase 200 by 20%.

  1. 260
  2. 40
  3. 220
  4. 240
Show the answer

Answer: D. 240

+ 40.