I got a 100 on a test with 11 problems. But, my sister only got 10 questions right. What percentage did she get?

Answer 1

To find the percentage your sister got on her test, you can use the following formula:

$$\text{Percentage}=\left(\frac{\text{Number of correct answers}}{\text{Total number of questions}}\right)\times 100$$

In this case, your sister got 10 questions right out of 11 total:

$$\text{Percentage}=\left(\frac{10}{11}\right)\times 100$$

Calculating that:

$$\text{Percentage}=\left(0.9091\right)\times 100\approx 90.91$$

So, your sister got approximately 90.91%.