Percent Error and Percent Change Practice
Quantitative Skills · Ratios and Percents
New numbers every set.
Choose one skill for 8 questions, or Mixed review for 12. Every set has new numbers.
No timer. Use scratch paper and a calculator. The rules from the lesson are below.
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Reference
Percent error and percent change
- Percent error = |measured − accepted| ÷ accepted × 100.
- The accepted value is the true value scientists agree on. It always goes on the bottom.
- The absolute value bars make percent error positive. It is never negative.
- Percent change = (new − original) ÷ original × 100. The original value always goes on the bottom.
- Keep the sign: positive means an increase (+35%), negative means a decrease (−25.0%). Always subtract new minus original.
Practice for the Percent Error and Percent Change lesson in Quantitative Skills. Original ZornScience questions.
About this activity
Find percent error from measured and accepted values, and percent change with its sign. Check which value goes on the bottom and what a sign means.
Related lessons
- Percent Error and Percent ChangeQuantitative Skills