
A ratio of 25 to 21 can be written as 25 to 21, 25:21, or 25/21. Furthermore, 25 and 21 can be the quantity or measurement of anything, such as students, fruit, weights, heights, speed and so on.
A ratio of 25 to 21 simply means that for every 25 of something, there are 21 of something else, with a total of 46.
In the box below, you can enter a number in either box and we will calculate the other number to keep the ratio of 25 to 21. In other words, we will calculate the corresponding equivalent ratio of 25:21 for you.
To calculate the left side of the ratio, our calculator multiplies the right side by 25 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 25. Answers are rounded to two decimals if necessary.
Below is a list of equivalent ratios of 25:21 that we created using our 25:21 ratio calculator above.
25:21
50:42
75:63
100:84
125:105
150:126
175:147
200:168
225:189
250:210
275:231
300:252
We have also created a pie chart for you to put 25:21 ratio in perspective. To do so, we divided a pie into 46 pieces and then colored 25 pieces green and 21 pieces blue. The pie will look exactly the same using any equivalent ratio of 25:21.

The green part of the pie covers 54.35% and the blue part covers 45.65%. To calculate the percentages, we divided each side of the ratio by its total and then multiplied by 100, like this:
(25 / 46)×100 ≈ 54.35
(21 / 46)×100 ≈ 45.65
In fractional terms, 25/21 of the pie above is colored in green. This means that the ratio of 25 to 21 or 25:21 can also be expressed as a fraction, where the 25 to the left of the colon is the numerator and the 21 to the right of the colon is the denominator:
25:21 = 25/21
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 25 to 21, the width is 25 and the height is 21. Below is a picture of what a rectangle with a ratio of 25:21 looks like.

Since the simplest form of the fraction 25/21 is 25/21, the simplest form of the ratio 25:21 is also 25:21.
Ratio Calculator
Need information about another ratio? Here you can submit another ratio for us to explain.
Ratio of 25 to 22
Go to the next ratio on our list that we have detailed information about.
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