Worked formula example
Percent Error Lab Report Examples
The measured value is 2% below the accepted value by percent error. The example keeps the problem, given values, formula, substitution, and copyable result sentence together so the calculator page can be opened only when values or units change.
Worked examples
| Step | Value |
|---|---|
| Problem | Find percent error for a measured value against an accepted value. |
| Given values | Measured = 9.8, expected = 10.0 |
| Formula | Percent error = |measured - expected| / |expected| x 100 |
| Calculation | |9.8 - 10.0| / 10.0 x 100 = 2% |
| Copyable result sentence | The measured value is 2% below the accepted value by percent error. |
| Step | Value |
|---|---|
| Problem | Find percent error when the measured value is above the accepted value. |
| Given values | Measured = 10.4, expected = 10.0 |
| Formula | Percent error = |measured - expected| / |expected| x 100 |
| Calculation | |10.4 - 10.0| / 10.0 x 100 = 4% |
| Copyable result sentence | The measured value is 4% above the accepted value by percent error. |
| Step | Value |
|---|---|
| Problem | Choose a different report line when the accepted value is zero. |
| Given values | Measured = 0.2, expected = 0 |
| Formula | Percent error divides by |expected| |
| Calculation | Division by zero is undefined, so percent error is not valid. |
| Copyable result sentence | When the expected value is zero, report absolute error instead of percent error. |
Copyable result sentence
The measured value is 2% below the accepted value by percent error.
Common mistakes
- Dropping units before the percent error lab report examples substitution.
- Rounding the percent error lab report examples calculation before the final step.
- Using a formula variant that does not match the known values for percent error lab report examples.