To find the percentage of problems that Aubrey got correct, you can use the formula:
\[ \text{Percentage} = \left( \frac{\text{Number of Correct Answers}}{\text{Total Number of Problems}} \right) \times 100 \]
In this case, Aubrey got 86 problems correct out of 100. Plugging the numbers into the formula gives:
\[ \text{Percentage} = \left( \frac{86}{100} \right) \times 100 \]
Calculating that:
\[ \text{Percentage} = 0.86 \times 100 = 86% \]
Thus, Aubrey got 86% of the problems correct.