Converting Fractions to Have a Denominator of 20

Oct 13, 2025 by windailys.com 53 views

Introduction

Rational numbers are a fundamental concept in mathematics, and understanding their properties is crucial for various mathematical operations. In this article, we will explore the concept of rational numbers and how to determine the number of rational numbers between two given fractions with a specific denominator.

What Are Rational Numbers?

Rational numbers are numbers that can be expressed as the ratio of two integers, where the denominator is non-zero. In other words, a rational number is a number that can be written in the form a/b, where a and b are integers and b is non-zero. Examples of rational numbers include 3/4, 22/7, and 1/2.

Understanding the Problem

The problem asks us to find the number of rational numbers between 30/100 and 48/100 with 20 as their denominator. To solve this problem, we need to first convert the given fractions to have a denominator of 20.

Converting Fractions to Have a Denominator of 20

To convert a fraction to have a denominator of 20, we can multiply both the numerator and the denominator by the same number. In this case, we need to multiply both the numerator and the denominator of 30/100 by 2 to get 60/200, and multiply both the numerator and the denominator of 48/100 by 2 to get 96/200.

Finding the Number of Rational Numbers

Now that we have converted the fractions to have a denominator of 20, we can find the number of rational numbers between 60/200 and 96/200. To do this, we need to find the smallest integer greater than or equal to 60/200 and the largest integer less than or equal to 96/200.

Finding the Smallest Integer Greater Than or Equal to 60/200

To find the smallest integer greater than or equal to 60/200, we can divide 60 by 200 and round up to the nearest integer. 60 divided by 200 is 0.3, so the smallest integer greater than or equal to 60/200 is 1.

Finding the Largest Integer Less Than or Equal to 96/200

To find the largest integer less than or equal to 96/200, we can divide 96 by 200 and round down to the nearest integer. 96 divided by 200 is 0.48, so the largest integer less than or equal to 96/200 is 0.

Calculating the Number of Rational Numbers

Now that we have found the smallest integer greater than or equal to 60/200 and the largest integer less than or equal to 96/200, we can calculate the number of rational numbers between 60/200 and 96/200. The number of rational numbers is equal to the difference between the largest integer and the smallest integer plus 1.

Conclusion

In conclusion, the number of rational numbers between 30/100 and 48/100 with 20 as their denominator is equal to the difference between the largest integer and the smallest integer plus 1. By converting the fractions to have a denominator of 20 and finding the smallest integer greater than or equal to 60/200 and the largest integer less than or equal to 96/200, we can calculate the number of rational numbers between 60/200 and 96/200.

Step-by-Step Solution

Here is a step-by-step solution to the problem:

Convert the fractions 30/100 and 48/100 to have a denominator of 20.
Find the smallest integer greater than or equal to 60/200.
Find the largest integer less than or equal to 96/200.
Calculate the number of rational numbers between 60/200 and 96/200.

Example Use Case

The problem can be used to illustrate the concept of rational numbers and how to determine the number of rational numbers between two given fractions with a specific denominator. This problem can be used in a variety of mathematical contexts, including algebra and geometry.

Code Solution

Here is a code solution to the problem in Python:

def find_rational_numbers():
    # Convert the fractions to have a denominator of 20
    fraction1 = (30 * 2) / (100 * 2)
    fraction2 = (48 * 2) / (100 * 2)
# Find the smallest integer greater than or equal to 60/200
smallest_integer = int(fraction1) + 1

# Find the largest integer less than or equal to 96/200
largest_integer = int(fraction2)

# Calculate the number of rational numbers
number_of_rational_numbers = largest_integer - smallest_integer + 1

return number_of_rational_numbers

number_of_rational_numbers = find_rational_numbers()
print(number_of_rational_numbers)

Conclusion

Q: What is the definition of a rational number?

A: A rational number is a number that can be expressed as the ratio of two integers, where the denominator is non-zero. In other words, a rational number is a number that can be written in the form a/b, where a and b are integers and b is non-zero.

Q: How do I convert a fraction to have a denominator of 20?

A: To convert a fraction to have a denominator of 20, you can multiply both the numerator and the denominator by the same number. For example, to convert 30/100 to have a denominator of 20, you can multiply both the numerator and the denominator by 2 to get 60/200.

Q: How do I find the smallest integer greater than or equal to 60/200?

A: To find the smallest integer greater than or equal to 60/200, you can divide 60 by 200 and round up to the nearest integer. 60 divided by 200 is 0.3, so the smallest integer greater than or equal to 60/200 is 1.

Q: How do I find the largest integer less than or equal to 96/200?

A: To find the largest integer less than or equal to 96/200, you can divide 96 by 200 and round down to the nearest integer. 96 divided by 200 is 0.48, so the largest integer less than or equal to 96/200 is 0.

Q: How do I calculate the number of rational numbers between 60/200 and 96/200?

A: To calculate the number of rational numbers between 60/200 and 96/200, you can find the difference between the largest integer and the smallest integer and add 1. In this case, the largest integer is 0 and the smallest integer is 1, so the number of rational numbers is 0 - 1 + 1 = 0.

Q: What is the significance of the number of rational numbers between 30/100 and 48/100 with 20 as their denominator?

A: The number of rational numbers between 30/100 and 48/100 with 20 as their denominator is significant because it illustrates the concept of rational numbers and how to determine the number of rational numbers between two given fractions with a specific denominator. This concept is important in mathematics and has many practical applications.

Q: Can you provide an example use case for this problem?

A: Yes, the problem can be used to illustrate the concept of rational numbers and how to determine the number of rational numbers between two given fractions with a specific denominator. This problem can be used in a variety of mathematical contexts, including algebra and geometry.

Q: Can you provide a code solution for this problem?

A: Yes, here is a code solution for this problem in Python:

def find_rational_numbers():
    # Convert the fractions to have a denominator of 20
    fraction1 = (30 * 2) / (100 * 2)
    fraction2 = (48 * 2) / (100 * 2)
# Find the smallest integer greater than or equal to 60/200
smallest_integer = int(fraction1) + 1

# Find the largest integer less than or equal to 96/200
largest_integer = int(fraction2)

# Calculate the number of rational numbers
number_of_rational_numbers = largest_integer - smallest_integer + 1

return number_of_rational_numbers

number_of_rational_numbers = find_rational_numbers()
print(number_of_rational_numbers)

Q: What is the final answer to the problem?

A: The final answer to the problem is 0. This is because the largest integer less than or equal to 96/200 is 0, and the smallest integer greater than or equal to 60/200 is 1, so the number of rational numbers is 0 - 1 + 1 = 0.