Ratio of 3 to 9 (3:9)

Ratio of 3 to 9

A ratio of 3 to 9 can be written as 3 to 9, 3:9, or 3/9. Furthermore, 3 and 9 can be the quantity or measurement of anything, such as students, fruit, weights, heights, speed and so on.

A ratio of 3 to 9 simply means that for every 3 of something, there are 9 of something else, with a total of 12.

In the box below, you can enter a number in either box and we will calculate the other number to keep the ratio of 3 to 9. In other words, we will calculate the corresponding equivalent ratio of 3:9 for you.

To calculate the left side of the ratio, our calculator multiplies the right side by 3 and then divides the product by 9. To calculate the right side of the ratio, our calculator multiplies the left side by 9 and then divides the product by 3. Answers are rounded to two decimals if necessary.

Below is a list of equivalent ratios of 3:9 that we created using our 3:9 ratio calculator above.

1:3

2:6

3:9

4:12

5:15

6:18

7:21

8:24

9:27

10:30

11:33

12:36

We have also created a pie chart for you to put 3:9 ratio in perspective. To do so, we divided a pie into 12 pieces and then colored 3 pieces green and 9 pieces blue. The pie will look exactly the same using any equivalent ratio of 3:9.

3 to 9 pie ratio

The green part of the pie covers 25% and the blue part covers 75%. To calculate the percentages, we divided each side of the ratio by its total and then multiplied by 100, like this:

(3 / 12)×100 = 25
(9 / 12)×100 = 75

In fractional terms, 3/9 of the pie above is colored in green. This means that the ratio of 3 to 9 or 3:9 can also be expressed as a fraction, where the 3 to the left of the colon is the numerator and the 9 to the right of the colon is the denominator:

3:9 = 3/9

Ratio is often used when defining rectangles in width:height format. Width and height can be feet, inches, centimeters, or any other kind of length. With a ratio of 3 to 9, the width is 3 and the height is 9. Below is a picture of what a rectangle with a ratio of 3:9 looks like.

3 to 9 pie rectangle

Since the simplest form of the fraction 3/9 is 1/3, the simplest form of the ratio 3:9 is also 1:3.

Ratio Calculator
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Ratio of 3 to 10
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