The formula to calculate the percent deviation is:
\[ \text{D} = \frac{(\text{Xm} - \text{Xt})}{\text{Xt}} \times 100 \]
Where:
A percent deviation is defined as the percentage difference between a measured value and a true value. It indicates how much a measured value deviates from the true value in percentage terms.
Example:
Calculation:
\[ \text{D} = \frac{(105 - 100)}{100} \times 100 = \frac{5}{100} \times 100 = 5\% \]