What is the formula to calculate accuracy in measurements?

The formula that correctly defines accuracy in measurements is centered on how close a measured value is to the true value, expressed as a percentage of the true value. The chosen formula states that accuracy is calculated by taking the difference between the measured value and the true value, dividing that by the true value, and then multiplying by 100 to express it as a percentage.

This approach highlights the relative size of the error in relation to the true value, which is essential in assessing the accuracy of a measurement. When using true value as the denominator, it allows for a direct comparison of how significant the measurement error is in relation to what is considered accurate. The result provides a meaningful percentage that indicates the degree of accuracy in the measurement process.

In contrast, other formulations use the measured value as a denominator, which can distort the perception of accuracy since they do not consider how the measured value relates to the true value appropriately. Therefore, the chosen method is the most appropriate for evaluating the accuracy of measurements in a meaningful way.