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The important thing to know is the following. If you have an equality relating two fractions, for example:
1/2 = 3/6,
then the numerator of one fraction times the denominator of the second is the same as the numerator of the second times the denominator of the first. In this example, 1 x 6 = 2 x 3. This can often be used to solve problems. For example, a typical question with percentages is, "20 is 15% of...?" Writing this as a proportion, and remembering that percent means hundredths:
20/x = 15/100
Now just solve for x. 15x = 20 times 100, 15x = 2000, x = 166.67.
The important thing to know is the following. If you have an equality relating two fractions, for example:
1/2 = 3/6,
then the numerator of one fraction times the denominator of the second is the same as the numerator of the second times the denominator of the first. In this example, 1 x 6 = 2 x 3. This can often be used to solve problems. For example, a typical question with percentages is, "20 is 15% of...?" Writing this as a proportion, and remembering that percent means hundredths:
20/x = 15/100
Now just solve for x. 15x = 20 times 100, 15x = 2000, x = 166.67.
The important thing to know is the following. If you have an equality relating two fractions, for example:
1/2 = 3/6,
then the numerator of one fraction times the denominator of the second is the same as the numerator of the second times the denominator of the first. In this example, 1 x 6 = 2 x 3. This can often be used to solve problems. For example, a typical question with percentages is, "20 is 15% of...?" Writing this as a proportion, and remembering that percent means hundredths:
20/x = 15/100
Now just solve for x. 15x = 20 times 100, 15x = 2000, x = 166.67.
The important thing to know is the following. If you have an equality relating two fractions, for example:
1/2 = 3/6,
then the numerator of one fraction times the denominator of the second is the same as the numerator of the second times the denominator of the first. In this example, 1 x 6 = 2 x 3. This can often be used to solve problems. For example, a typical question with percentages is, "20 is 15% of...?" Writing this as a proportion, and remembering that percent means hundredths:
20/x = 15/100
Now just solve for x. 15x = 20 times 100, 15x = 2000, x = 166.67.
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SteveThe important thing to know is the following. If you have an equality relating two fractions, for example:
1/2 = 3/6,
then the numerator of one fraction times the denominator of the second is the same as the numerator of the second times the denominator of the first. In this example, 1 x 6 = 2 x 3. This can often be used to solve problems. For example, a typical question with percentages is, "20 is 15% of...?" Writing this as a proportion, and remembering that percent means hundredths:
20/x = 15/100
Now just solve for x. 15x = 20 times 100, 15x = 2000, x = 166.67.
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How do you know if a fraction is proportional?
All fractions are proportional to some other fraction.
How do you determine whether ratios are proportional?
you divide the numerator by the denominator, if you get the same to the other fractions, it is proportional. Another solution is if you reduce the two fractions to simplest form and they are the same, they are also proportional.
Why do the denominators have to be the same for both fractions when adding and subtracting?
It makes it easier. So both of the fractions are proportional to each other.
What do fractions help with?
Fractions help with numbers that are not whole numbers.
What does it mean for two things to be proportional?
two fractions tht go into each other
