Ratio of 40 to 21 (40:21)

Ratio of 40 to 21

A ratio of 40 to 21 can be written as 40 to 21, 40:21, or 40/21. Furthermore, 40 and 21 can be the quantity or measurement of anything, such as students, fruit, weights, heights, speed and so on.

A ratio of 40 to 21 simply means that for every 40 of something, there are 21 of something else, with a total of 61.

In the box below, you can enter a number in either box and we will calculate the other number to keep the ratio of 40 to 21. In other words, we will calculate the corresponding equivalent ratio of 40:21 for you.

To calculate the left side of the ratio, our calculator multiplies the right side by 40 and then divides the product by 21. To calculate the right side of the ratio, our calculator multiplies the left side by 21 and then divides the product by 40. Answers are rounded to two decimals if necessary.

Below is a list of equivalent ratios of 40:21 that we created using our 40:21 ratio calculator above.

40:21

80:42

120:63

160:84

200:105

240:126

280:147

320:168

360:189

400:210

440:231

480:252

We have also created a pie chart for you to put 40:21 ratio in perspective. To do so, we divided a pie into 61 pieces and then colored 40 pieces green and 21 pieces blue. The pie will look exactly the same using any equivalent ratio of 40:21.

40 to 21 pie ratio

The green part of the pie covers 65.57% and the blue part covers 34.43%. To calculate the percentages, we divided each side of the ratio by its total and then multiplied by 100, like this:

(40 / 61)×100 ≈ 65.57
(21 / 61)×100 ≈ 34.43

In fractional terms, 40/21 of the pie above is colored in green. This means that the ratio of 40 to 21 or 40:21 can also be expressed as a fraction, where the 40 to the left of the colon is the numerator and the 21 to the right of the colon is the denominator:

40:21 = 40/21

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 40 to 21, the width is 40 and the height is 21. Below is a picture of what a rectangle with a ratio of 40:21 looks like.

40 to 21 pie rectangle

Since the simplest form of the fraction 40/21 is 40/21, the simplest form of the ratio 40:21 is also 40:21.

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Ratio of 40 to 22
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