What is a Reciprocal?

In mathematics, the reciprocal, also known as multiplicative inverse, is the station of a number x. Denoted together 1/x or x-1. This method that the product that a number x and also its reciprocal returns 1.

You are watching: Reciprocal of -1/2

The station of a portion a/b is denoted as (a/b)-1, i beg your pardon is b/a. This write-up discusses the actions on exactly how to discover the mutual of a number, blended numbers, fractions and decimals.

How to discover Reciprocals?

The reciprocal of a number is just the number that has been flipped or turning back upside-down. This involves transposing a number such the the numerator and denominator are inserted at the bottom and top respectively.

To uncover the reciprocal of a totality number, just transform it right into a portion in which the original number is the denominator and the molecule is 1.

Example 1

The reciprocal of 2/3 is 3/2.

The product that 2/3 and its mutual 3/2 is 1.

2/3 x 3/2 = 1

Example 2

The reciprocal of a entirety number 7 is 1/7 since 7 x 1/7 = 1.

How to uncover the reciprocal of a blended Number?

In order to uncover the reciprocal of a blended fraction, convert it right into improper fraction an initial and then apply the same preeminence we learnt above.

Example 3

Find the reciprocal of 4 1/2.


Convert a mixed portion into one improper fraction as calculated below.

4 1/2 = (4 x 2) + 1/ 2

= 9/2

Now flip the numerator and denominator the 9/2.Therefore, the systems for the mutual of 4 1/2 is 2/9.

How to uncover the mutual of Decimal Numbers?

Like various other numbers, decimal numbers too have reciprocals. Calculating the mutual of a decimal number have the right to be done in the following ways:

Convert the decimal into an indistinguishable fraction, for example, 0.25 = 1/4, and also therefore, the mutual is 4/1 = 4.You can likewise use a calculation to divide 1 by the fraction. For example, the mutual of 0.25 = 1/0.25 = 4

It can be detailed that dividing 1 through a portion is the very same as multiply the reciprocal of the number by 1. For example,

5 ÷ 1/4

= 5 x 4/1

= 20

Example 4

Solve the adhering to problems:

a. Uncover the reciprocal of 5


5 = 5/1

So, the reciprocal of 3 = 1/5

b. Find the mutual of 1/4


To uncover the mutual of 1/4, invert the numerator and also denominator.

The reciprocal of 1/4 = 4

c. Recognize the reciprocal of 10/3


Step 1:

To uncover the mutual of 10/3, upper and lower reversal the numerator and also denominator. The reciprocal = 3/10.

Example 5

If 4/7 that a number x is 84. What is the worth of x?

Solution4/7 the a number x = 84Write the mathematics equation:

(4/7) x = 84

Multiply both sides by the reciprocal of 4/7Number x = 84 × 7/4

= 21 × 7= 147And thus, the number x is 147.

Example 6

A half of the college student in a college room boys, 3/5 that these guys take scientific research courses and the remainder take humanities. What portion of the boys take humanities?


Fraction of guys in the college = 1/2

Fraction the boys who take scientific researches = 3/5 the 1/2

= 3/5 × 1/2

= 3 × 1/5 × 2

= 3/10

Therefore, 3/10 that the boys take humanities.

Example 7

Pedro has written three-fifth that his 75 paged study work. How many pages room left to finish writing his research?

SolutionNumber that pages composed = 3/5 that 75= 3/5 × 7

= 45 pages.Number the pages left= 75 – 45.= 30 pages.

See more: 100,000 Yen In Usd ) - 100000 Jpy To Usd (Yen To Us Dollar) Fx Convert

Example 8

A herd that cows in a farm produces 99 liters of milk daily. If each cow produce one-third of complete milk created in a day. How many cows are in the farm yard if 7700 liters that milk is created weekly.

SolutionA herd that cows to produce 99 liters that milk daily.One cow produces 1/3 of full milk everyday = 1/3 that 99Therefore, one cow produce 11 liters.Total variety of animals in the farm= (7700/7) ÷ 11= 100 cows