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To find the percent increase in Ashley's hourly wage, we use the following formula for percent increase:

\[
\text{Percent Increase} = \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \times 100
\]

Here:
- The old wage is $ 15 $.
- The new wage is $ 16.50 $.

Substituting into the formula:

\[
\text{Percent Increase} = \frac{16.50 - 15}{15} \times 100
\]

Looking at the options in the image:

- Option **B** corresponds to the correct formula: $\frac{16.50 - 15}{15} \times 100$.

Thus, **Option B** is the correct choice.

Would you like further details or explanations on this problem? Here are some related questions:

1. How do you calculate percent decrease?
2. What is the general formula for percent change?
3. How would you solve this if only the percent increase was given, but not the old wage?
4. Can you explain why Option C is incorrect in this context?
5. How would you express this as a decimal increase instead of a percentage?

**Tip:** Always remember that the denominator in percent increase problems is the original value, not the new one!

Ashley got a raise this month. Her hourly wage increased from $15 to $16.50. Which expression could be used to find the percent increase?

Learn how to find the percent increase in Ashley's hourly wage, which rose from $15 to $16.50. This problem covers basic arithmetic concepts and the percent increase formula. Suitable for students in Grades 6-8.

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