To calculate the percent error in the thermometer's reading, we use the formula:
Percent Error = (|Measured Value - Actual Value| / Actual Value) * 100%
Given:
- Actual temperature = 25°C
- Thermometer reading = 27°C
Substitute these values into the formula:
Percent Error = (|27 - 25| / 25) * 100%
Percent Error = (|2| / 25) * 100%
Percent Error = (2 / 25) * 100%
Percent Error = 0.08 * 100%
Percent Error = 8%
So, the percent error in the thermometer's reading is 8%.