3/8 - 4 as a fraction

Learn how to find what is 3/8 minus 4 in fraction form just in a few minutes. We have covered the easiest method to write 3/8 - 4 as a fraction and decimal.

Summary: 3/8 minus 4 = -29/8
Since both fractions have unequal denominators, 3/8 minus 4 is an unlike fractions subtraction. For subtracting unlike fractions, you have to first find the equivalent fractions for fraction 3/8 and fraction 4 in order to have the same denominators for both fractions. Therefore, you have to find the LCM of denominators 8 and 1. 8 is the LCM of 8 and 1. Multiplying the LCM 8 with the numerators and denominators of both fractions (3/8 x 8/8) - (4 x 8/8), and simplify further in order to have the common denominator. So the equivalent fraction for 3/8 is 3/8 and for 4 is 32/8. By simplifying this fraction subtraction 3/8 - 32/8, it becomes -29/8.

CALCULATION: 3/8 - 4 as a fraction
3/8 - 4 = (?)
3/8 - 4/1 = [(3 x 1) - (4 x 8)]/(8 x 1)
= (3 - 32)/8
= -29/8
3/8 - 4 = -29/8
3/8 minus 4 as a fraction is -29/8.

where
3/8 is a proper fraction as a minuend,
4 is a whole number as a subtrahend,
-29/8 is the difference between 3/8 and 4.

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3/8 minus 4 as a decimal
3/8 - 4 = -29/8
-29/8 = -3.625
(3/8) - (4) as a decimal is -3.625

where
-3.625 is the difference between 3/8 and 4.

The below workout with step by step calculation shows how to find the difference between fraction and a whole number by subtracting 4 from 3/8. use any one of the following methods to find the equivalent fraction for 3/8 minus 4.
1. LCM method
2. Cross multiplication method.

(3/8) - (4) using LCM Method:
What is 3/8 minus 4 as a fraction?

step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 3/8
Fraction B: 4/1

What to be found?
(3/8) - (4) = ?
Find what's the difference between 3/8 and 4.

step 2 Compare the denominators of fractions 3/8 and 4 to identify whether it is a like or unlike fraction subtraction. Since the denominators of given fractions 3/8 and 4 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 3/8 and 4:
The LCM of 8 and 1 is 8.

step 4 Write the fractions 3/8 and 4 in the subtraction expression form and multiply LCM with all the numerators and denominators of both fractions.
= 3/8 - 4
= [(3 x 8)/(8 x 8)] - [(4 x 8)/(1 x 8)]

step 5 Simplify the expression to have common denominator:
= 3/8 - 32/8

step 6 Take the common values out and rewrite the above expression like the below:
= 1/8 x (3/1 - 32/1)
= 1/8 x (3 - 32)

step 7Simplify the above expression further:
= 1/8 x -29
= -29/8
3/8 - 4 = -29/8

Hence,
3/8 minus 4 as a fraction is -29/8.

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3/8 - 4 using Cross Multiplication Method:
step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 3/8
Fraction B: 4/1

What to be found?
(3/8)-(4) = ?
Find what's the difference between 3/8 and 4.

step 2 Find the product of numerator of Fraction A and denominator of Fraction B (3 x 1), find the product of numerator of Fraction B and denominator of Fraction A (4 x 8), and find the product of both denominators of Fraction A and Fraction B (8 x 1) and rewrite the equation as like the below:
= (3 x 1) - (4 x 8)/(8 x 1)

step 3 Simplify and rewrite the fraction:
= (3 - 32)/8
3/8 - 4 = -29/8

Hence,
3/8 minus 4 in fraction is -29/8