Free Grade 3 Introduction to Percentage Decrease in Context Techniques Lessons
Free Grade 3 lessons for Introduction to Percentage Decrease in Context Techniques: 12 real questions with a full answer key and worked solutions. Per cent means 'out of 100'. Find 10% by dividing by 10 or 1% by dividing by 100, then build up. For an increase or decrease, use a multiplier.
Free
Core
25 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- UnderstandExplain introduction to percentage decrease in context techniques
Explain introduction to percentage decrease in context techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introduction to percentage decrease in context techniques
Calculate introduction to percentage decrease in context techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introduction to percentage decrease in context techniques
Compare introduction to percentage decrease in context techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify introduction to percentage decrease in context techniques
Justify introduction to percentage decrease in context techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
Prerequisites
Close these gaps first — each has its own free lesson, worksheet and quiz.
How Introduction to Percentage Decrease in Context Techniques works
Per cent means 'out of 100'. Find 10% by dividing by 10 or 1% by dividing by 100, then build up. For an increase or decrease, use a multiplier.
12 practice questions
Easy to hard, 24 marks in total. Try them first, then open the answers.
- 1.Find 75% of 140.[1]
- 2.Find 75% of 460.[1]
- 3.Find 10% of 60.[1]
- 4.Find 10% of 240.[1]
- 5.Find 20% of 760.[2]
- 6.Find 30% of 640.[2]
- 7.Find 30% of 520.[2]
- 8.Find 20% of 120.[2]
- 9.Decrease $40.00 by 5%.[3]
- 10.Decrease $140.00 by 40%.[3]
- 11.Decrease $380.00 by 60%.[3]
- 12.Decrease $700.00 by 60%.[3]
Show answers and working
1. 105
1% of 140 = 1.4. 75% = 1.4 × 75 = 105.
2. 345
1% of 460 = 4.6. 75% = 4.6 × 75 = 345.
3. 6
1% of 60 = 0.6. 10% = 0.6 × 10 = 6.
4. 24
1% of 240 = 2.4. 10% = 2.4 × 10 = 24.
5. 152
1% of 760 = 7.6. 20% = 7.6 × 20 = 152.
6. 192
1% of 640 = 6.4. 30% = 6.4 × 30 = 192.
7. 156
1% of 520 = 5.2. 30% = 5.2 × 30 = 156.
8. 24
1% of 120 = 1.2. 20% = 1.2 × 20 = 24.
9. $38.00
Multiplier: 1 − 0.05 = 0.95. 40 × 0.95 = 38.
10. $84.00
Multiplier: 1 − 0.4 = 0.6. 140 × 0.6 = 84.
11. $152.00
Multiplier: 1 − 0.6 = 0.4. 380 × 0.4 = 152.
12. $280.00
Multiplier: 1 − 0.6 = 0.4. 700 × 0.4 = 280.
Worked examples
Find 50% of 40.
- 1% of 40 = 0.4.
- 50% = 0.4 × 50 = 20.
- Answer: 20
Find 20% of 80.
- 1% of 80 = 0.8.
- 20% = 0.8 × 20 = 16.
- Answer: 16
Increase $240.00 by 5%.
- Multiplier: 1 + 0.05 = 1.05.
- 240 × 1.05 = 252.
- Answer: $252.00
Interactive practice
Free, no account required — answer on screen or print it.
Common mistakes
What learners typically get wrong, and how to fix it.
Finds 10% and stops when asked for a 10% decrease.
Correction: Subtract the 10% from the original.
Thinks a 50% rise then 50% fall returns to the start.
Correction: The second percentage is of a different amount.
Teacher tips
- · Teach 10%, 5%, 1% building blocks before multipliers.
Parent tips
- · Work out the tip at a restaurant together.
Real-life applications
- · Sales, tips, tax and interest.
Assessment objectives
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Frequently asked
- Is this Grade 3 Introduction to Percentage Decrease in Context Techniques lesson really free?
- Yes. Every lessons on FreeMathWorksheet is free to use, print and share — no account, no paywall and no watermark.
- What should a learner already know before this?
- Start with Percentage Decrease in Context Essentials. Each one has its own free lesson, worksheet and quiz.
- How is the lesson sequenced?
- Recognition first, then understanding, application, reasoning and finally mastery — the same ladder used across every free resource on the platform.
- What comes next after Introduction to Percentage Decrease in Context Techniques?
- Move on to Key Vocabulary of Percentage Decrease in Context Techniques, Rules and Methods in Percentage Decrease in Context Techniques, Working with Percentage Decrease in Context Techniques, Percentage Decrease in Context Techniques in Examinations, which build directly on this idea.
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