18/1 - 5/8 as a fraction

Learn how to find what is 18/1 minus 5/8 in fraction form just in a few minutes. We have covered the easiest method to write 18/1 - 5/8 as a fraction and decimal.

Summary: 18/1 minus 5/8 = 139/8
Since both fractions have unequal denominators, 18/1 minus 5/8 is an unlike fractions subtraction. For subtracting unlike fractions, you have to first find the equivalent fractions for fraction 18/1 and fraction 5/8 in order to have the same denominators for both fractions. Therefore, you have to find the LCM of denominators 1 and 8. 8 is the LCM of 1 and 8. Multiplying the LCM 8 with the numerators and denominators of both fractions (18/1 x 8/8) - (5/8 x 8/8), and simplify further in order to have the common denominator. So the equivalent fraction for 18/1 is 144/8 and for 5/8 is 5/8. By simplifying this fraction subtraction 144/8 - 5/8, it becomes 139/8.

CALCULATION: 18/1 - 5/8 as a fraction
18/1 - 5/8 = (?)
18/1 - 5/8 = [(18 x 8) - (5 x 1)]/(1 x 8)
= (144 - 5)/8
= 139/8
18/1 - 5/8 = 139/8
18/1 minus 5/8 as a fraction is 139/8.

where
18/1 is a improper fraction as a minuend,
5/8 is a proper fraction as a subtrahend,
139/8 is the difference between 18/1 and 5/8.

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18/1 minus 5/8 as a decimal
18/1 - 5/8 = 139/8
139/8 = 17.375
(18/1) - (5/8) as a decimal is 17.375

where
17.375 is the difference between 18/1 and 5/8.

The below workout with step by step calculation shows how to find what is the difference between two fractions by subtracting a fraction 5/8 from 18/1. For different, unequal or unlike denominators, use any one of the following methods to find the equivalent fraction for 18/1 minus 5/8.
1. LCM method
2. Cross multiplication method.

(18/1) - (5/8) using LCM Method:
What is 18/1 minus 5/8 as a fraction?

step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 18/1
Fraction B: 5/8

What to be found?
(18/1) - (5/8) = ?
Find what's the difference between 18/1 and 5/8.

step 2 Compare the denominators of fractions 18/1 and 5/8 to identify whether it is a like or unlike fraction subtraction. Since the denominators of given fractions 18/1 and 5/8 are not equal, it is said to be unlike fractions subtraction.

step 3For unlike fractions subtraction, find the LCM (least common multiple) of both denominators of fractions 18/1 and 5/8:
The LCM of 1 and 8 is 8.

step 4 Write the fractions 18/1 and 5/8 in the subtraction expression form and multiply LCM with all the numerators and denominators of both fractions.
= 18/1 - 5/8
= [(18 x 8)/(1 x 8)] - [(5 x 8)/(8 x 8)]

step 5 Simplify the expression to have common denominator:
= 144/8 - 5/8

step 6 Take the common values out and rewrite the above expression like the below:
= 1/8 x (144/1 - 5/1)
= 1/8 x (144 - 5)

step 7Simplify the above expression further:
= 1/8 x 139
= 139/8
18/1 - 5/8 = 139/8

Hence,
18/1 minus 5/8 as a fraction is 139/8.

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18/1 - 5/8 using Cross Multiplication Method:
step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 18/1
Fraction B: 5/8

What to be found?
(18/1)-(5/8) = ?
Find what's the difference between 18/1 and 5/8.

step 2 Find the product of numerator of Fraction A and denominator of Fraction B (18 x 8), find the product of numerator of Fraction B and denominator of Fraction A (5 x 1), and find the product of both denominators of Fraction A and Fraction B (1 x 8) and rewrite the equation as like the below:
= (18 x 8) - (5 x 1)/(1 x 8)

step 3 Simplify and rewrite the fraction:
= (144 - 5)/8
18/1 - 5/8 = 139/8

Hence,
18/1 minus 5/8 in fraction is 139/8