Question

Which of the following numbers is the reciprocal of 0.4?

F.
4
G. -0.4
H. 10.4
J. 2.5
K. 5.2

Answer 1

J. 2.5

Explanation:

A reciprocal is the inverse of a number. The reciprocal of a number is 1 divided by the number.

With a decimal number, it's best to convert the number into fraction form. In fraction form, you just have to switch the numerator and denominator to find the reciprocal.

0.4 = 4/10 = 2/5

Reverse the numerator and denominator to get 5/2.

Convert 5/2 to a decimal:

5/2 = 2.5