What is the reciprocal of 87/21? Here we will define reciprocal of 87/21, and show you how to calculate the reciprocal of 87/21 in fraction form and decimal form.
The reciprocal of 87/21 is a fraction or a number that when multiplied by 87/21 is equal to 1. To get the reciprocal of 87/21 based on that definition, we can make the following equation where "R" is the reciprocal of 87/21.
(87/21) × R = 1
When we solve for R, we get the answer to the reciprocal of 87/21 as a fraction as follows:
(87/21) × R = 1
R = 21/87
Reciprocal of 87/21 = 21/87
You can check that the answer is correct by confirming that 87/21 times the reciprocal of 87/21 is equal to 1, like this:
87/21 × 21/87 = 1
To find the decimal answer to the reciprocal of 87/21, you divide the numerator of the reciprocal by the demoninator of the reciprocal, like this:
21 ÷ 87 ≈ 0.241379310345
Reciprocal of 87/21 ≈ 0.241379310345
Tip: As you may have inferred from our tutorial above, you can quickly get the reciprocal of any fraction, such as 87/21, by switching the numerator and the denominator.
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Reciprocal of 87/22
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