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Understanding the Fraction 85/315: A Comprehensive Guide



This article provides a comprehensive exploration of the fraction 85/315. We'll delve into simplifying this fraction, converting it to a decimal and percentage, and exploring real-world applications. Understanding fractions is crucial for various aspects of mathematics and everyday life, from baking recipes to calculating proportions. This guide aims to clarify the concepts surrounding 85/315, making it accessible to learners of all levels.

I. Simplifying the Fraction 85/315



The fraction 85/315 represents 85 parts out of a total of 315 parts. Before performing any calculations, it's essential to simplify the fraction to its lowest terms. This makes the fraction easier to understand and work with. Simplification involves finding the greatest common divisor (GCD) of the numerator (85) and the denominator (315) and dividing both by it.

To find the GCD, we can use the prime factorization method. The prime factorization of 85 is 5 x 17. The prime factorization of 315 is 3 x 3 x 5 x 7 (or 3² x 5 x 7). The common factor between 85 and 315 is 5.

Dividing both the numerator and the denominator by 5, we get:

85 ÷ 5 = 17
315 ÷ 5 = 63

Therefore, the simplified fraction is 17/63. This simplified form represents the same proportion as 85/315 but is more concise and easier to manage in calculations.

II. Converting to a Decimal



To convert the simplified fraction 17/63 to a decimal, we perform the division: 17 ÷ 63.

This results in approximately 0.2698. The decimal representation provides a different perspective on the value of the fraction, making it easier to compare with other decimal numbers. Note that this is an approximate value; the decimal representation of 17/63 is a non-terminating, non-repeating decimal.

III. Converting to a Percentage



To convert the fraction 17/63 to a percentage, we multiply the decimal equivalent (approximately 0.2698) by 100:

0.2698 x 100 = 26.98%

This percentage represents the proportion of 85 out of 315 as a percentage of the whole. Percentages are often used to express proportions in everyday contexts, such as discounts, grades, and statistics.

IV. Real-World Applications



Let's consider some scenarios where understanding 85/315 (or its simplified form 17/63) would be useful:

Baking: If a recipe calls for 315 grams of flour and you only want to make a smaller portion using 85 grams, you're using 85/315 or 17/63 of the original recipe. This understanding allows you to proportionally reduce other ingredients.

Surveys: If 85 out of 315 respondents answered "yes" to a survey question, 17/63 or approximately 27% responded affirmatively.

Inventory: If a warehouse has 315 units of a product and 85 have been sold, 17/63 or about 27% of the inventory remains.

Probability: If there are 315 equally likely outcomes in an event, and 85 of those outcomes are favorable, the probability of a favorable outcome is 17/63 or approximately 27%.


V. Summary



The fraction 85/315, when simplified, becomes 17/63. This simplified fraction represents the same proportion but is more manageable for calculations. Converting 17/63 to a decimal gives approximately 0.2698, and converting it to a percentage yields approximately 26.98%. These different representations offer various ways to understand and apply the proportion represented by 85/315 in diverse real-world situations, from baking to statistics.


VI. Frequently Asked Questions (FAQs)



1. What is the simplest form of 85/315? The simplest form of 85/315 is 17/63.

2. How do I convert 85/315 to a decimal? Divide the numerator (85) by the denominator (315). The result is approximately 0.2698.

3. What is 85/315 as a percentage? Approximately 26.98%.

4. Can I simplify 85/315 any further than 17/63? No, 17 and 63 have no common factors other than 1, meaning 17/63 is the fraction in its simplest form.

5. What are some practical uses for understanding fractions like 85/315? Fractions are essential for scaling recipes, calculating proportions in surveys and data analysis, determining probabilities, and understanding parts of a whole in various contexts.

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