Free Grade 3 Rules and Methods in Percentage Decrease in Context Essentials Lessons
Free Grade 3 lessons for Rules and Methods in Percentage Decrease in Context Essentials: 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 rules and methods in percentage decrease in context essentials
Explain rules and methods in percentage decrease in context essentials accurately in a familiar context.
Assessed by: Exit ticket of four short items
- ApplyCalculate rules and methods in percentage decrease in context essentials
Calculate rules and methods in percentage decrease in context essentials accurately in a familiar context.
Assessed by: Exit ticket of four short items
- AnalyseCompare rules and methods in percentage decrease in context essentials
Compare rules and methods in percentage decrease in context essentials accurately in a familiar context.
Assessed by: Exit ticket of four short items
- EvaluateJustify rules and methods in percentage decrease in context essentials
Justify rules and methods in percentage decrease in context essentials 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 Rules and Methods in Percentage Decrease in Context Essentials 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 25% of 540.[1]
- 2.Find 50% of 380.[1]
- 3.Find 25% of 660.[1]
- 4.Find 10% of 760.[1]
- 5.Find 12.5% of 700.[2]
- 6.Find 5% of 200.[2]
- 7.Find 35% of 140.[2]
- 8.Find 35% of 120.[2]
- 9.Decrease $800.00 by 40%.[3]
- 10.Decrease $260.00 by 20%.[3]
- 11.Increase $300.00 by 12.5%.[3]
- 12.Increase $480.00 by 40%.[3]
Show answers and working
1. 135
1% of 540 = 5.4. 25% = 5.4 × 25 = 135.
2. 190
1% of 380 = 3.8. 50% = 3.8 × 50 = 190.
3. 165
1% of 660 = 6.6. 25% = 6.6 × 25 = 165.
4. 76
1% of 760 = 7.6. 10% = 7.6 × 10 = 76.
5. 87.5
1% of 700 = 7. 12.5% = 7 × 12.5 = 87.5.
6. 10
1% of 200 = 2. 5% = 2 × 5 = 10.
7. 49
1% of 140 = 1.4. 35% = 1.4 × 35 = 49.
8. 42
1% of 120 = 1.2. 35% = 1.2 × 35 = 42.
9. $480.00
Multiplier: 1 − 0.4 = 0.6. 800 × 0.6 = 480.
10. $208.00
Multiplier: 1 − 0.2 = 0.8. 260 × 0.8 = 208.
11. $337.50
Multiplier: 1 + 0.125 = 1.125. 300 × 1.125 = 337.5.
12. $672.00
Multiplier: 1 + 0.4 = 1.4. 480 × 1.4 = 672.
Worked examples
Find 75% of 320.
- 1% of 320 = 3.2.
- 75% = 3.2 × 75 = 240.
- Answer: 240
Find 12.5% of 200.
- 1% of 200 = 2.
- 12.5% = 2 × 12.5 = 25.
- Answer: 25
Decrease $560.00 by 60%.
- Multiplier: 1 − 0.6 = 0.4.
- 560 × 0.4 = 224.
- Answer: $224.00
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
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- What should a learner already know before this?
- Start with Key Vocabulary of Percentage Decrease in Context Essentials, Introduction to Percentage Decrease in Context Essentials, Working with Percentage Decrease. 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 Rules and Methods in Percentage Decrease in Context Essentials?
- Move on to Working with Percentage Decrease in Context Essentials, Percentage Decrease in Context Essentials in Examinations, Percentage Decrease in Context Techniques, Percentage Decrease in Context Word Problems, which build directly on this idea.
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