If a student earns 70% on an exam with 200 questions, how many questions did they answer correctly?

To determine how many questions the student answered correctly on the exam, you can calculate 70% of the total number of questions, which is 200. The percentage can be converted to a decimal by dividing it by 100, resulting in 0.70.

Next, multiply this decimal by the total number of questions:

0.70 × 200 = 140.

This calculation shows that the student answered 140 questions correctly, confirming that the answer is indeed accurate. The approach used here emphasizes understanding how to work with percentages and provides a direct method for calculating an outcome based on a known total and percentage.