Two and a half equals five halves so its reciprocal is 2/5 or two-fifths
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21/2 = 5/2 ⇒ reciprocal of 21/2 = 1 ÷ 5/2 = 2/5
The reciprocal of 2 is 1/2 (one-half). The reciprocal of any number is 1/number. Simply stated: The reciprocal of any number is the inverse of that number. Let some number, any number, be represented by 'a'. The reciprocal of 'a' is 1/'a'.
That is correct. To divide by a half, you are actually multiplying by two. ■
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The reciprocal of 12 and one half is one over 12 and one half, or simply, 1/12.5.