Compare percentage-point differences
Compare percentage-point differences
About 18 minutes, plus any extended practice
Supplied materials
- Paper or a text document; all cases below are original fictional learning inputs.
- An adult may read aloud; drawing or spoken answers are valid. No personal health information or physical performance is required.
- The separate worked case gives laterPercent=85, earlierPercent=65. Subtract the earlier percentage from the later percentage. First identify the quantities and keep their units consistent. The calculation is 85-65=20 percentage points. Round to six decimal places where needed. That result answers this supplied planning question only. It does not establish what a real person did, diagnose a condition or prove physical skill. Compare the units with the question before accepting a number.
- Fictional case 1: laterPercent=70, earlierPercent=50. What is the modeled result using the stated method?
- Fictional case 2: laterPercent=80, earlierPercent=60. What is the modeled result using the stated method?
- Fictional case 3: laterPercent=65, earlierPercent=45. What is the modeled result using the stated method?
- Fictional case 4: laterPercent=75, earlierPercent=50. What is the modeled result using the stated method?
- Fictional case 5: laterPercent=90, earlierPercent=70. What is the modeled result using the stated method?
- Fictional case 6: laterPercent=60, earlierPercent=40. What is the modeled result using the stated method?
Learn the idea
A difference between two percentages is expressed in percentage points. Moving from fifty to sixty percent is ten percentage points, not ten percent relative growth. The supplied fictional accessibility study measures completion of one paper-information task.
Subtract the old completion percentage from the new percentage. These cases increase. A relative change would instead divide by the old percentage before multiplying by one hundred; that answers a different question. Report the requested measure explicitly.
Use the fictional aggregate values only. No real learner or medical data is required. The difference does not establish a cause, a clinical benefit or performance across every audience. It is descriptive evidence for one supplied model.
- Mark the facts or constraints in the supplied case.
- Apply the method explained above; draw a sequence, table or decision map.
- Compare your result with the worked solution and explain the difference.
- Complete the new cases, then check the changed-case extension.
See the method in action
The separate worked case gives laterPercent=85, earlierPercent=65. Subtract the earlier percentage from the later percentage. First identify the quantities and keep their units consistent. The calculation is 85-65=20 percentage points. Round to six decimal places where needed. That result answers this supplied planning question only. It does not establish what a real person did, diagnose a condition or prove physical skill. Compare the units with the question before accepting a number.
Check your reasoning
Your answer is temporary and is not saved to an account. Download your current answer before leaving or reloading. Written work on paper or in another app stays in your own file.
Helpful tips
- Subtract percentages for their point difference.
- A descriptive difference alone does not establish why it changed.
See the answer and explanation
20 percentage points
Subtract the earlier percentage from the later percentage. With laterPercent=70, earlierPercent=50, calculate 70-50=20 percentage points. Results are rounded to six decimal places where needed. This is a supplied model, not a personal health assessment.
Take it further
Changed case: laterPercent=72, earlierPercent=60. Show the operation. Expected: 72-60=12 percentage points; round to six decimal places where needed, retain model limits and explain the units.
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More practice: try new cases
Choose an answer for each problem. Explain your method on paper, then use the feedback to decide what to revisit.
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Check the subject sources
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