18 out of 20 is what percentage

18 out of 20 is what percentage

The correct answer and explanation is:

To calculate what percentage 18 out of 20 is: 1820×100=90%\frac{18}{20} \times 100 = 90\%

Correct Answer: 90%

Explanation (Approximately 300 Words):

Understanding percentages is a key math skill, especially in fields like healthcare, business, and education. Percent means “per hundred,” so when we say 90%, we mean 90 out of every 100.

To calculate a percentage, you divide the part (in this case, 18) by the whole (which is 20), and then multiply by 100: 1820=0.90.9×100=90%\frac{18}{20} = 0.9 \\ 0.9 \times 100 = 90\%

This tells us that 18 is 90% of 20.

Let’s break that down. Imagine you have 20 questions on a test. If you answer 18 correctly, you’re being asked what percentage of the test you got right. By dividing the number you got right (18) by the total number (20), you’re finding out how large a portion of the whole you succeeded at. Multiplying by 100 simply converts that portion into a percentage form, which is easier to understand and compare.

In many grading systems, 90% is considered an “A” or excellent performance. Understanding how to interpret and calculate percentages is especially important in real-world applications. For example, a nurse may need to calculate medication dosages based on a percentage of a standard dose. A business analyst may assess performance changes by comparing percentage increases or decreases.

Using this same formula, you can calculate percentages for any scenario: part ÷ whole × 100. This formula works whether you’re figuring out discounts, test scores, or proportions in research data.

In conclusion, 18 out of 20 is 90%. This means that you achieved 90% of the total, which is a strong performance. Being able to interpret and calculate percentages accurately is not only useful in academics but also in professional and everyday decision-making.