Final answer:
Emma's exam score of 72 out of 80 items can be converted to a percent by dividing 72 by 80 and multiplying by 100, which results in a score of 90%.
Step-by-step explanation:
To convert Emma's score to a percent, you divide her score (72) by the total possible score (80) and then multiply the result by 100. Here's the calculation:
Percentage = (Score ÷ Total score) × 100%
Percentage = (72 ÷ 80) × 100%
Percentage = 0.9 × 100%
Percentage = 90%
Therefore, Emma scored 90% on her exam.