Final answer:
The percentage difference between an experimental value and a theoretical value is calculated by dividing the absolute value of the difference between the two values by the theoretical value and then multiplying by 100%.
Step-by-step explanation:
To calculate the percentage difference between an experimental value and a theoretical value, you can use the following formula:
Percentage Difference = \(|\frac{{Experimental Value - Theoretical Value}}{{Theoretical Value}} \times 100%|\)
Remember to take the absolute value of the difference to ensure the percentage difference is positive. For example, if an experiment yields a value of 20 grams and the theoretical value is 25 grams, the percentage difference would be calculated as follows:
Percentage Difference = \(|\frac{{20g - 25g}}{{25g}} \times 100%| = |\frac{{-5}}{{25}} \times 100%| = |-0.20 \times 100%| = 20%\)
In this case, the percentage difference between experiment and theory is 20%.