18/5 - 4/9 as a fraction

Learn how to find what is 18/5 minus 4/9 in fraction form just in a few minutes. We have covered the easiest method to write 18/5 - 4/9 as a fraction and decimal.

Summary: 18/5 minus 4/9 = 142/45
Since both fractions have unequal denominators, 18/5 minus 4/9 is an unlike fractions subtraction. For subtracting unlike fractions, you have to first find the equivalent fractions for fraction 18/5 and fraction 4/9 in order to have the same denominators for both fractions. Therefore, you have to find the LCM of denominators 5 and 9. 45 is the LCM of 5 and 9. Multiplying the LCM 45 with the numerators and denominators of both fractions (18/5 x 45/45) - (4/9 x 45/45), and simplify further in order to have the common denominator. So the equivalent fraction for 18/5 is 162/45 and for 4/9 is 20/45. By simplifying this fraction subtraction 162/45 - 20/45, it becomes 142/45.

CALCULATION: 18/5 - 4/9 as a fraction
18/5 - 4/9 = (?)
18/5 - 4/9 = [(18 x 9) - (4 x 5)]/(5 x 9)
= (162 - 20)/45
= 142/45
18/5 - 4/9 = 142/45
18/5 minus 4/9 as a fraction is 142/45.

where
18/5 is a improper fraction as a minuend,
4/9 is a proper fraction as a subtrahend,
142/45 is the difference between 18/5 and 4/9.

---

18/5 minus 4/9 as a decimal
18/5 - 4/9 = 142/45
142/45 = 3.1556
(18/5) - (4/9) as a decimal is 3.1556

where
3.1556 is the difference between 18/5 and 4/9.

The below workout with step by step calculation shows how to find what is the difference between two fractions by subtracting a fraction 4/9 from 18/5. For different, unequal or unlike denominators, use any one of the following methods to find the equivalent fraction for 18/5 minus 4/9.
1. LCM method
2. Cross multiplication method.

(18/5) - (4/9) using LCM Method:
What is 18/5 minus 4/9 as a fraction?

step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 18/5
Fraction B: 4/9

What to be found?
(18/5) - (4/9) = ?
Find what's the difference between 18/5 and 4/9.

step 2 Compare the denominators of fractions 18/5 and 4/9 to identify whether it is a like or unlike fraction subtraction. Since the denominators of given fractions 18/5 and 4/9 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 18/5 and 4/9:
The LCM of 5 and 9 is 45.

step 4 Write the fractions 18/5 and 4/9 in the subtraction expression form and multiply LCM with all the numerators and denominators of both fractions.
= 18/5 - 4/9
= [(18 x 45)/(5 x 45)] - [(4 x 45)/(9 x 45)]

step 5 Simplify the expression to have common denominator:
= 162/45 - 20/45

step 6 Take the common values out and rewrite the above expression like the below:
= 1/45 x (162/1 - 20/1)
= 1/45 x (162 - 20)

step 7Simplify the above expression further:
= 1/45 x 142
= 142/45
18/5 - 4/9 = 142/45

Hence,
18/5 minus 4/9 as a fraction is 142/45.

---

18/5 - 4/9 using Cross Multiplication Method:
step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 18/5
Fraction B: 4/9

What to be found?
(18/5)-(4/9) = ?
Find what's the difference between 18/5 and 4/9.

step 2 Find the product of numerator of Fraction A and denominator of Fraction B (18 x 9), find the product of numerator of Fraction B and denominator of Fraction A (4 x 5), and find the product of both denominators of Fraction A and Fraction B (5 x 9) and rewrite the equation as like the below:
= (18 x 9) - (4 x 5)/(5 x 9)

step 3 Simplify and rewrite the fraction:
= (162 - 20)/45
18/5 - 4/9 = 142/45

Hence,
18/5 minus 4/9 in fraction is 142/45