8/7 - 9 as a fraction

Learn how to find what is 8/7 minus 9 in fraction form just in a few minutes. We have covered the easiest method to write 8/7 - 9 as a fraction and decimal.

Summary: 8/7 minus 9 = -55/7
Since both fractions have unequal denominators, 8/7 minus 9 is an unlike fractions subtraction. For subtracting unlike fractions, you have to first find the equivalent fractions for fraction 8/7 and fraction 9 in order to have the same denominators for both fractions. Therefore, you have to find the LCM of denominators 7 and 1. 7 is the LCM of 7 and 1. Multiplying the LCM 7 with the numerators and denominators of both fractions (8/7 x 7/7) - (9 x 7/7), and simplify further in order to have the common denominator. So the equivalent fraction for 8/7 is 8/7 and for 9 is 63/7. By simplifying this fraction subtraction 8/7 - 63/7, it becomes -55/7.

CALCULATION: 8/7 - 9 as a fraction
8/7 - 9 = (?)
8/7 - 9/1 = [(8 x 1) - (9 x 7)]/(7 x 1)
= (8 - 63)/7
= -55/7
8/7 - 9 = -55/7
8/7 minus 9 as a fraction is -55/7.

where
8/7 is a improper fraction as a minuend,
9 is a whole number as a subtrahend,
-55/7 is the difference between 8/7 and 9.

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8/7 minus 9 as a decimal
8/7 - 9 = -55/7
-55/7 = -7.8571
(8/7) - (9) as a decimal is -7.8571

where
-7.8571 is the difference between 8/7 and 9.

The below workout with step by step calculation shows how to find the difference between fraction and a whole number by subtracting 9 from 8/7. use any one of the following methods to find the equivalent fraction for 8/7 minus 9.
1. LCM method
2. Cross multiplication method.

(8/7) - (9) using LCM Method:
What is 8/7 minus 9 as a fraction?

step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 8/7
Fraction B: 9/1

What to be found?
(8/7) - (9) = ?
Find what's the difference between 8/7 and 9.

step 2 Compare the denominators of fractions 8/7 and 9 to identify whether it is a like or unlike fraction subtraction. Since the denominators of given fractions 8/7 and 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 8/7 and 9:
The LCM of 7 and 1 is 7.

step 4 Write the fractions 8/7 and 9 in the subtraction expression form and multiply LCM with all the numerators and denominators of both fractions.
= 8/7 - 9
= [(8 x 7)/(7 x 7)] - [(9 x 7)/(1 x 7)]

step 5 Simplify the expression to have common denominator:
= 8/7 - 63/7

step 6 Take the common values out and rewrite the above expression like the below:
= 1/7 x (8/1 - 63/1)
= 1/7 x (8 - 63)

step 7Simplify the above expression further:
= 1/7 x -55
= -55/7
8/7 - 9 = -55/7

Hence,
8/7 minus 9 as a fraction is -55/7.

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8/7 - 9 using Cross Multiplication Method:
step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 8/7
Fraction B: 9/1

What to be found?
(8/7)-(9) = ?
Find what's the difference between 8/7 and 9.

step 2 Find the product of numerator of Fraction A and denominator of Fraction B (8 x 1), find the product of numerator of Fraction B and denominator of Fraction A (9 x 7), and find the product of both denominators of Fraction A and Fraction B (7 x 1) and rewrite the equation as like the below:
= (8 x 1) - (9 x 7)/(7 x 1)

step 3 Simplify and rewrite the fraction:
= (8 - 63)/7
8/7 - 9 = -55/7

Hence,
8/7 minus 9 in fraction is -55/7