7/9 - 4/5 as a fraction

Learn how to find what is 7/9 minus 4/5 in fraction form just in a few minutes. We have covered the easiest method to write 7/9 - 4/5 as a fraction and decimal.

Summary: 7/9 minus 4/5 = -1/45
Since both fractions have unequal denominators, 7/9 minus 4/5 is an unlike fractions subtraction. For subtracting unlike fractions, you have to first find the equivalent fractions for fraction 7/9 and fraction 4/5 in order to have the same denominators for both fractions. Therefore, you have to find the LCM of denominators 9 and 5. 45 is the LCM of 9 and 5. Multiplying the LCM 45 with the numerators and denominators of both fractions (7/9 x 45/45) - (4/5 x 45/45), and simplify further in order to have the common denominator. So the equivalent fraction for 7/9 is 35/45 and for 4/5 is 36/45. By simplifying this fraction subtraction 35/45 - 36/45, it becomes -1/45.

CALCULATION: 7/9 - 4/5 as a fraction
7/9 - 4/5 = (?)
7/9 - 4/5 = [(7 x 5) - (4 x 9)]/(9 x 5)
= (35 - 36)/45
= -1/45
7/9 - 4/5 = -1/45
7/9 minus 4/5 as a fraction is -1/45.

where
7/9 is a proper fraction as a minuend,
4/5 is a proper fraction as a subtrahend,
-1/45 is the difference between 7/9 and 4/5.

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7/9 minus 4/5 as a decimal
7/9 - 4/5 = -1/45
-1/45 = -0.0222
(7/9) - (4/5) as a decimal is -0.0222

where
-0.0222 is the difference between 7/9 and 4/5.

The below workout with step by step calculation shows how to find what is the difference between two fractions by subtracting a fraction 4/5 from 7/9. For different, unequal or unlike denominators, use any one of the following methods to find the equivalent fraction for 7/9 minus 4/5.
1. LCM method
2. Cross multiplication method.

(7/9) - (4/5) using LCM Method:
What is 7/9 minus 4/5 as a fraction?

step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 7/9
Fraction B: 4/5

What to be found?
(7/9) - (4/5) = ?
Find what's the difference between 7/9 and 4/5.

step 2 Compare the denominators of fractions 7/9 and 4/5 to identify whether it is a like or unlike fraction subtraction. Since the denominators of given fractions 7/9 and 4/5 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 7/9 and 4/5:
The LCM of 9 and 5 is 45.

step 4 Write the fractions 7/9 and 4/5 in the subtraction expression form and multiply LCM with all the numerators and denominators of both fractions.
= 7/9 - 4/5
= [(7 x 45)/(9 x 45)] - [(4 x 45)/(5 x 45)]

step 5 Simplify the expression to have common denominator:
= 35/45 - 36/45

step 6 Take the common values out and rewrite the above expression like the below:
= 1/45 x (35/1 - 36/1)
= 1/45 x (35 - 36)

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

Hence,
7/9 minus 4/5 as a fraction is -1/45.

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7/9 - 4/5 using Cross Multiplication Method:
step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 7/9
Fraction B: 4/5

What to be found?
(7/9)-(4/5) = ?
Find what's the difference between 7/9 and 4/5.

step 2 Find the product of numerator of Fraction A and denominator of Fraction B (7 x 5), find the product of numerator of Fraction B and denominator of Fraction A (4 x 9), and find the product of both denominators of Fraction A and Fraction B (9 x 5) and rewrite the equation as like the below:
= (7 x 5) - (4 x 9)/(9 x 5)

step 3 Simplify and rewrite the fraction:
= (35 - 36)/45
7/9 - 4/5 = -1/45

Hence,
7/9 minus 4/5 in fraction is -1/45