Join us in mastering the concept of Percentage Error, where precision meets scrutiny. Understand how to evaluate the accuracy of your measurements and calculations.

**Example 1: Scientific Calibration**-
In a scientific instrument calibration, you record a temperature reading of 98.5°C, but the true temperature is 100°C. What is the percentage error in the measurement?

**Example 2: Chemical Concentration**-
The concentration of a chemical solution is measured as 4.8 mol/L, but the true concentration is 5.0 mol/L. What is the percentage error in the measurement?

**Example 3: Astronomical Observation **-
During stargazing, the measured brightness of a star is 2.7 magnitudes, but the true magnitude is 2.5. What is the percentage error in the observation?