What is the reciprocal of 42/21? Here we will define reciprocal of 42/21, and show you how to calculate the reciprocal of 42/21 in fraction form and decimal form.
The reciprocal of 42/21 is a fraction or a number that when multiplied by 42/21 is equal to 1. To get the reciprocal of 42/21 based on that definition, we can make the following equation where "R" is the reciprocal of 42/21.
(42/21) × R = 1
When we solve for R, we get the answer to the reciprocal of 42/21 as a fraction as follows:
(42/21) × R = 1
R = 21/42
Reciprocal of 42/21 = 21/42
You can check that the answer is correct by confirming that 42/21 times the reciprocal of 42/21 is equal to 1, like this:
42/21 × 21/42 = 1
To find the decimal answer to the reciprocal of 42/21, you divide the numerator of the reciprocal by the demoninator of the reciprocal, like this:
21 ÷ 42 = 0.5
Reciprocal of 42/21 = 0.5
Tip: As you may have inferred from our tutorial above, you can quickly get the reciprocal of any fraction, such as 42/21, 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 42/22
Here is the next fraction on our list that we have calculated the reciprocal of.