Question

Jack took a test and got 13/17. He took a retest and got 12/15.
Jack's grade
.
increased
decreased
stayed the same

Answer 1

To determine whether Jack's grade increased, decreased, or stayed the same, we can calculate his scores as percentages for both the original test and the retest.

1. **Original Test Score:**
\[
\text{Score} = \frac{13}{17}
\]
To convert to a percentage:
\[
\text{Percentage} = \left(\frac{13}{17}\right) \times 100 \approx 76.47\%
\]

2. **Retest Score:**
\[
\text{Score} = \frac{12}{15}
\]
To convert to a percentage:
\[
\text{Percentage} = \left(\frac{12}{15}\right) \times 100 = 80\%
\]

Now, we can compare the two percentages:
- Original Test: approximately 76.47%
- Retest: 80%

Since 80% is greater than 76.47%, Jack's grade **increased** after the retest.