the reciprocal of 2 over 9 is 9 over 2
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1 is the reciprocal of 1.
In mathematics to form the reciprocal of a quantity is to divide one by that quantity:The reciprocal of 2 is 1/2.The reciprocal of a-b is 1/(a-b).
The reciprocal of [ 2 over 3 ] is [ 3 over 2].1 / (2/3) = (3/2).
To divide by a fraction, you multiply by its reciprocal. This is related to the facts that (1) division is the opposite of multiplication, and (2) a reciprocal is the multiplicative "opposite" of a number.
The reciprocal of 7 is 1/7 The reciprocal of an integer a is the fraction 1/a