
What is the reciprocal of 21/42? Here we will define reciprocal of 21/42, and show you how to calculate the reciprocal of 21/42 in fraction form and decimal form.
The reciprocal of 21/42 is a fraction or a number that when multiplied by 21/42 is equal to 1. To get the reciprocal of 21/42 based on that definition, we can make the following equation where "R" is the reciprocal of 21/42.
(21/42) × R = 1
When we solve for R, we get the answer to the reciprocal of 21/42 as a fraction as follows:
(21/42) × R = 1
R = 42/21
Reciprocal of 21/42 = 42/21
You can check that the answer is correct by confirming that 21/42 times the reciprocal of 21/42 is equal to 1, like this:
21/42 × 42/21 = 1
To find the decimal answer to the reciprocal of 21/42, you divide the numerator of the reciprocal by the demoninator of the reciprocal, like this:
42 ÷ 21 = 2
Reciprocal of 21/42 = 2
Tip: As you may have inferred from our tutorial above, you can quickly get the reciprocal of any fraction, such as 21/42, by switching the numerator and the denominator.
Reciprocal of a fraction
Do you need the reciprocal of another fraction? No problem! Please enter another fraction below.
Reciprocal of 21/43
Here is the next fraction on our list that we have calculated the reciprocal of.