Free Grade 3 Introducing Percentage Decrease Techniques Lesson Plans
Free Grade 3 lesson plans for Introducing Percentage Decrease 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
Foundation
15 min
24
Learning objectives
Every objective is checkable, and each one maps to an activity and an assessment.
- RememberIdentify introducing percentage decrease techniques
Identify introducing percentage decrease techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
- UnderstandExplain introducing percentage decrease techniques
Explain introducing percentage decrease techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate introducing percentage decrease techniques
Calculate introducing percentage decrease techniques accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare introducing percentage decrease techniques
Compare introducing percentage decrease 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 Introducing Percentage Decrease 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 10% of 800.[1]
- 2.Find 75% of 780.[1]
- 3.Find 50% of 700.[1]
- 4.Find 10% of 340.[1]
- 5.Find 35% of 280.[2]
- 6.Find 40% of 320.[2]
- 7.Find 15% of 640.[2]
- 8.Find 35% of 380.[2]
- 9.Increase $120.00 by 30%.[3]
- 10.Decrease $760.00 by 60%.[3]
- 11.Decrease $40.00 by 30%.[3]
- 12.Increase $60.00 by 20%.[3]
Show answers and working
1. 80
1% of 800 = 8. 10% = 8 × 10 = 80.
2. 585
1% of 780 = 7.8. 75% = 7.8 × 75 = 585.
3. 350
1% of 700 = 7. 50% = 7 × 50 = 350.
4. 34
1% of 340 = 3.4. 10% = 3.4 × 10 = 34.
5. 98
1% of 280 = 2.8. 35% = 2.8 × 35 = 98.
6. 128
1% of 320 = 3.2. 40% = 3.2 × 40 = 128.
7. 96
1% of 640 = 6.4. 15% = 6.4 × 15 = 96.
8. 133
1% of 380 = 3.8. 35% = 3.8 × 35 = 133.
9. $156.00
Multiplier: 1 + 0.3 = 1.3. 120 × 1.3 = 156.
10. $304.00
Multiplier: 1 − 0.6 = 0.4. 760 × 0.4 = 304.
11. $28.00
Multiplier: 1 − 0.3 = 0.7. 40 × 0.7 = 28.
12. $72.00
Multiplier: 1 + 0.2 = 1.2. 60 × 1.2 = 72.
Worked examples
Find 10% of 620.
- 1% of 620 = 6.2.
- 10% = 6.2 × 10 = 62.
- Answer: 62
Find 35% of 780.
- 1% of 780 = 7.8.
- 35% = 7.8 × 35 = 273.
- Answer: 273
Decrease $560.00 by 40%.
- Multiplier: 1 − 0.4 = 0.6.
- 560 × 0.6 = 336.
- Answer: $336.00
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
How mastery is evidenced, and which standards it maps to.
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Frequently asked
- Is this Grade 3 Introducing Percentage Decrease Techniques lesson plan really free?
- Yes. Every lesson plans 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 Introducing Percentage Decrease Essentials, Percentage Increase. Each one has its own free lesson, worksheet and quiz.
- How is the lesson plan 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 Introducing Percentage Decrease Techniques?
- Move on to Introducing Percentage Decrease Word Problems, Introducing Percentage Decrease Common Errors, Working with Percentage Decrease, Percentage Decrease in Context, which build directly on this idea.
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