SOLUTION: Which pair of numbers are reciprocals? A) 3 and 0.3 B) 5 and 1/5 C) 0.1 and 10 D) 3 and -3

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Question 42212: Which pair of numbers are reciprocals?
A) 3 and 0.3
B) 5 and 1/5
C) 0.1 and 10
D) 3 and -3
Answer by fractalier(6550) About Me  (Show Source):
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Choice B.
5 can be written as 5/1.
Reciprocals are fractions with the numerator and denominator switched.
Thus 5/1 and 1/5 are reciprocals.