To calculate the percent of change from 50 to 51, you can use the formula:
\[ \text{Percent Change} = \left( \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \right) \times 100 \]
Substituting the values:
\[ \text{Old Value} = 50, \quad \text{New Value} = 51 \]
\[ \text{Percent Change} = \left( \frac{51 - 50}{50} \right) \times 100 = \left( \frac{1}{50} \right) \times 100 = 2% \]
The percent change from 50 to 51 is 2%.