What is the first step in calculating percent error?

The first step in calculating percent error involves determining the absolute error, which is done by subtracting the approximate (or measured) value from the exact (or true) value. This step is crucial because it quantifies the discrepancy between what was measured and what is recognized as the true value. This calculated error is then instrumental in further calculations, such as expressing it as a percentage of the exact value.

Once the absolute error is established through the subtraction, the next steps include dividing the absolute error by the exact value and then converting that result into a percentage by multiplying by 100. This process ensures that the percentage error reflects how significant the error is in relation to the true value, providing valuable insight into the accuracy of a measurement.