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Percent error

Year 8 maths · Fieldbook Learning

Name ______________________ Date __________

Find the error, divide it by the actual value, and write it as a percent.

  1. Priya estimates a length as 63 cm. The actual length is 70 cm. What is the percent error? Write the percent only.
  2. Jamal estimates a length as 48 cm. The actual length is 40 cm. What is the percent error? Write the percent only.
  3. Mateo estimates a length as 90 cm. The actual length is 100 cm. What is the percent error? Write the percent only.
  4. Rosa estimates a length as 48 cm. The actual length is 40 cm. What is the percent error? Write the percent only.
  5. Sam estimates a length as 126 cm. The actual length is 120 cm. What is the percent error? Write the percent only.
  6. Hugo estimates a length as 105 cm. The actual length is 100 cm. What is the percent error? Write the percent only.
  7. Grace estimates a length as 120 cm. The actual length is 150 cm. What is the percent error? Write the percent only.
  8. Jamal estimates a length as 150 cm. The actual length is 125 cm. What is the percent error? Write the percent only.
  9. Rosa estimates a length as 168 cm. The actual length is 160 cm. What is the percent error? Write the percent only.
  10. Priya estimates a length as 152 cm. The actual length is 190 cm. What is the percent error? Write the percent only.
  11. Tara estimates a length as 171 cm. The actual length is 190 cm. What is the percent error? Write the percent only.
  12. Mateo estimates a length as 150 cm. The actual length is 120 cm. What is the percent error? Write the percent only.
  13. Femi estimates a length as 190 cm. The actual length is 200 cm. What is the percent error? Write the percent only.
  14. Jamal estimates a length as 188 cm. The actual length is 235 cm. What is the percent error? Write the percent only.
  15. Jamal estimates a length as 240 cm. The actual length is 250 cm. What is the percent error? Write the percent only.
  16. Jamal estimates a length as 54 cm. The actual length is 60 cm. What is the percent error? Write the percent only.
  17. Lena estimates a length as 159 cm. The actual length is 212 cm. What is the percent error? Write the percent only.
  18. Ava estimates a length as 315 cm. The actual length is 350 cm. What is the percent error? Write the percent only.
  19. Nia estimates a length as 426 cm. The actual length is 355 cm. What is the percent error? Write the percent only.
  20. Priya estimates a length as 405 cm. The actual length is 324 cm. What is the percent error? Write the percent only.
More free practice: fieldbooklearning.com/uk/practice/year-8/percent-error/

Play it as a quiz game

20 of these questions as multiple choice, with near-miss wrong answers, ready for Kahoot or Blooket.

  1. Download the game's own question template: in Kahoot, Add question → Import spreadsheet; in Blooket, Create a set → Spreadsheet import.
  2. Click the matching button below, then click the first empty question row of the template and paste.
  3. Save the template (Kahoot needs .xlsx, Blooket .csv) and upload it.
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Answer key: Percent error

  1. 10
  2. 20
  3. 10
  4. 20
  5. 5
  6. 5
  7. 20
  8. 20
  9. 5
  10. 20
  11. 10
  12. 25
  13. 5
  14. 20
  15. 4
  16. 10
  17. 25
  18. 10
  19. 20
  20. 25