To determine whether the theater teacher overestimated or underestimated the ticket sales and by how much, we can calculate the percentage difference between the estimated and actual ticket sales.
- Estimated ticket sales: 520
- Actual ticket sales: 600
Since the actual sales (600) are greater than the estimated sales (520), this means the teacher underestimated the ticket sales.
To find the percentage difference:
\[ \text{Difference} = \text{Actual} - \text{Estimated} = 600 - 520 = 80 \]
Next, we calculate the percentage of the estimated amount:
\[ \text{Percentage Underestimate} = \left( \frac{\text{Difference}}{\text{Estimated}} \right) \times 100 = \left( \frac{80}{520} \right) \times 100 \]
Now we calculate:
\[ \frac{80}{520} \approx 0.153846 \]
\[ 0.153846 \times 100 \approx 15.38 \]
So, the theater teacher underestimates the ticket sales by approximately 15.4%.
The correct statement is:
The theater teacher underestimates the ticket sales by approximately 15.4%.