Lesson

Percentages as ratios per hundred

Primary EducationGrade 6MathematicsCV-PRI-G06-MATH-FRA-U03-L0135–45 min

You will learn

  • Say what percent means.
  • Write a percent as a fraction.
  • Write a percent as a decimal.
  • Shade percentages on a grid.

Version 0.1 · published for early use · expert review pending Standards alignment: pending verification. Not yet reviewed against the Courseversity scorecard.

Student lesson

Words to know

percent
Per hundred.
hundredth
One of a hundred.
grid
100 squares.
whole
The full amount, 100%.

1. Discover: out of a hundred

45 of 100 squares are shaded. How can we describe the shaded part?

2. Understand: percent

  • 45 out of 100 is 45%, the fraction 45/100 and the decimal 0.45.
  • 7% = 7/100 = 0.07.
  • The whole is 100%.
  • 50% = 50/100 = 1/2.
45 squares shaded = 45%
Remember: Percent means per hundred.

3. Explore: shade

You need a grid.

  1. Count shaded squares.
  2. Write over 100.
  3. Write the percent.
  4. Write the decimal.
Think about it: what did you notice?

45%.

4. Practise

Guided practice

Question 1. 45 of 100 as a percent?

45%.

Question 2. 7% as a decimal?

0.07.

Question 3. 50% as a fraction?

1/2.

Independent practice

  1. 30 of 100 as a percent
  2. 9% as a fraction
  3. 25% as a decimal
  4. 100% means
  5. Shade 20% of the grid: how many squares?

Answers are in the answer key below. Try first, then check.

5. Apply: everyday mathematics

A phone is 80% charged. How many parts out of 100?

Show a sample answer

80.

6. Common mistake

Mistake: Writing 7% as 0.7.
Fix: 7% is 0.07.

7. Check and master

Answer all questions. You will see feedback after each one.

1. 45 out of 100 is:

2. 7% as a decimal:

3. 50% as a fraction:

4. 25% as a decimal:

5. 20% of a hundred grid:

Challenge. 100% of a quantity is:

Your result appears here after you answer every question.

8. Key takeaways

  • Percent means per hundred.
  • Percent = fraction over 100.
  • 100% is the whole.

9. Next lesson

Next lesson: Fractions, decimals and percentages. Keep going with the next idea in this course.

Printable worksheet

  1. 30 of 100
  2. 9% as a fraction
  3. 25% as a decimal
  4. 100% means
  5. 20% of the grid

Homework

Shade 35% of a hundred-square grid.

Answer key and marking scheme

Question Expected response Marks
30 of 100 30% 2
9% as a fraction 9/100 2
25% as a decimal 0.25 2
100% means the whole 2
20% of the grid 20 2
Total 10

Practice answers: Worksheet: 1 30%; 2 9/100; 3 0.25; 4 the whole; 5 20.

Quiz answers: 1 A, 2 B, 3 C, 4 A, 5 B, challenge C.

Mastery and remediation

Objective Bronze (Developing) Silver (Proficient) Gold (Advanced)
O1 Say what percent means Shows this with help from an adult or a picture Does this independently and explains how they know Explains it clearly and uses it in a new situation
O2 Write a percent as a fraction Shows this with help from an adult or a picture Does this independently and explains how they know Explains it clearly and uses it in a new situation
O3 Write a percent as a decimal Shows this with help from an adult or a picture Does this independently and explains how they know Explains it clearly and uses it in a new situation
O4 Shade percentages on a grid Shows this with help from an adult or a picture Does this independently and explains how they know Explains it clearly and uses it in a new situation

Proposed Courseversity thresholds for this page: Bronze = at least 3 of 5 core questions correct; Silver = all 5; Gold = all 5 plus the challenge. A badge is never a full record of progress.

If a learner struggles

  1. Find the misconception: Writing 7% as 0.7. 7% is 0.07.
  2. Explain another way: use real objects first, then pictures.
  3. Show a simpler example: Hundredths.
  4. Guided practice: work through one example together and let the learner try the next one.
  5. Reassess: use the quiz again or the worksheet.
  6. Move on when the learner shows Silver-level evidence independently.

Teacher package

1–5. Objectives, prerequisites, materials, preparation, duration

Lesson objectives. Learners will: say what percent means; write a percent as a fraction; write a percent as a decimal; shade percentages on a grid.

Prerequisite knowledge. Fractions and decimals.

Materials. Counters (stones, seeds or bottle tops), paper, pencils, board or chalkboard. Low-resource options: use stones, seeds, sticks, bottle tops or drawings in the sand or on the board instead of printed materials.

Preparation. Gather the counters and draw the example pictures on the board before the lesson.

Suggested duration. 35–45 minutes.

6–9. Teaching procedure, explanation notes, guided and independent activities

Introduction (5 min). Start with the Discover situation and let learners suggest ideas before you teach.

Explanation (10 min). Teach the Understand section with real objects first, then pictures, then symbols and words.

Guided activity (10 min). You need a grid. Learners follow the Explore steps in pairs.

Independent activity (10 min). Learners complete the independent practice and the worksheet.

Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.

Teacher explanation notes. Use the concrete, pictorial, abstract order: real objects first, then pictures, then symbols and words. Return to real objects whenever a learner needs support.

10–12. Differentiation, formative assessment, common misconceptions

Support. Use real objects and work with a partner; say each step aloud together. Extension. Ask learners to make up their own example and explain it to a partner.

Formative assessment. Listen to learner explanations, ask “how do you know?”, and check the independent work.

Misconceptions. Writing 7% as 0.7. 7% is 0.07.

13–15. Assessment questions, answer keys, marking scheme

Use the quiz and worksheet on this page. The 10-mark scheme and all answers are in the answer key above. Re-check every answer and the marking scheme before publication.

16–19. Remediation, enrichment, homework, teacher reflection

Remediation. Hundredths. Enrichment. Invite learners to find or create three more examples at home or in the classroom and explain them. Homework. See above.

Teacher reflection. After teaching, record: which concepts learners understood; which misconceptions occurred; which activities worked; which learners need more practice; and what to improve next time.

Sources and standards

Alignment is pending verification and no external endorsement is claimed. Reference starting points named in the Courseversity standard: Common Core State Standards for Mathematics, Cambridge Primary and the IB Primary Years Programme. Specific standard codes will be added once checked against the official documents.

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