What is a reciprocal?

The reciprocal of x is 1/x; of 15 is 1/15.

A reciprocal is a mathematical term that refers to the multiplicative inverse of a number. In simple terms, if you have a number x, the reciprocal of x is 1/x.

To find the reciprocal of a number, you simply divide 1 by the number. For example, to find the reciprocal of 15, you divide 1 by 15, which gives you 1/15.

In general, the reciprocal of any non-zero number x is 1 divided by x. It is important to note that the reciprocal of 0 does not exist since division by zero is undefined in mathematics.

By finding the reciprocal of a number, you essentially "flip" the number over a horizontal line. This can be useful in various mathematical applications, such as solving equations involving fractions or performing calculations with fractions.