9/4 - 7/20 as a fraction

Learn how to find what is 9/4 minus 7/20 in fraction form just in a few minutes. We have covered the easiest method to write 9/4 - 7/20 as a fraction and decimal.

Summary: 9/4 minus 7/20 = 19/10
Since both fractions have unequal denominators, 9/4 minus 7/20 is an unlike fractions subtraction. For subtracting unlike fractions, you have to first find the equivalent fractions for fraction 9/4 and fraction 7/20 in order to have the same denominators for both fractions. Therefore, you have to find the LCM of denominators 4 and 20. 20 is the LCM of 4 and 20. Multiplying the LCM 20 with the numerators and denominators of both fractions (9/4 x 20/20) - (7/20 x 20/20), and simplify further in order to have the common denominator. So the equivalent fraction for 9/4 is 45/20 and for 7/20 is 7/20. By simplifying this fraction subtraction 45/20 - 7/20, it becomes 38/20.

CALCULATION: 9/4 - 7/20 as a fraction
9/4 - 7/20 = (?)
9/4 - 7/20 = [(9 x 20) - (7 x 4)]/(4 x 20)
= (180 - 28)/80
= 152/80
= (8 x 19)/(8 x 10)
= 19/10
9/4 - 7/20 = 19/10
9/4 minus 7/20 as a fraction is 19/10.

where
9/4 is a improper fraction as a minuend,
7/20 is a proper fraction as a subtrahend,
19/10 is the difference between 9/4 and 7/20.

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9/4 minus 7/20 as a decimal
9/4 - 7/20 = 19/10
19/10 = 1.9
(9/4) - (7/20) as a decimal is 1.9

where
1.9 is the difference between 9/4 and 7/20.

The below workout with step by step calculation shows how to find what is the difference between two fractions by subtracting a fraction 7/20 from 9/4. For different, unequal or unlike denominators, use any one of the following methods to find the equivalent fraction for 9/4 minus 7/20.
1. LCM method
2. Cross multiplication method.

(9/4) - (7/20) using LCM Method:
What is 9/4 minus 7/20 as a fraction?

step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 9/4
Fraction B: 7/20

What to be found?
(9/4) - (7/20) = ?
Find what's the difference between 9/4 and 7/20.

step 2 Compare the denominators of fractions 9/4 and 7/20 to identify whether it is a like or unlike fraction subtraction. Since the denominators of given fractions 9/4 and 7/20 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 9/4 and 7/20:
The LCM of 4 and 20 is 20.

step 4 Write the fractions 9/4 and 7/20 in the subtraction expression form and multiply LCM with all the numerators and denominators of both fractions.
= 9/4 - 7/20
= [(9 x 20)/(4 x 20)] - [(7 x 20)/(20 x 20)]

step 5 Simplify the expression to have common denominator:
= 45/20 - 7/20

step 6 Take the common values out and rewrite the above expression like the below:
= 1/20 x (45/1 - 7/1)
= 1/20 x (45 - 7)

step 7Simplify the above expression further:
= 1/20 x 38
= 38/20
= 19/10
9/4 - 7/20 = 19/10

Hence,
9/4 minus 7/20 as a fraction is 19/10.

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9/4 - 7/20 using Cross Multiplication Method:
step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 9/4
Fraction B: 7/20

What to be found?
(9/4)-(7/20) = ?
Find what's the difference between 9/4 and 7/20.

step 2 Find the product of numerator of Fraction A and denominator of Fraction B (9 x 20), find the product of numerator of Fraction B and denominator of Fraction A (7 x 4), and find the product of both denominators of Fraction A and Fraction B (4 x 20) and rewrite the equation as like the below:
= (9 x 20) - (7 x 4)/(4 x 20)

step 3 Simplify and rewrite the fraction:
= (180 - 28)/80
= 152/80
= 19/10
9/4 - 7/20 = 19/10

Hence,
9/4 minus 7/20 in fraction is 19/10