What is 7/2 minus 7/8 in fraction?
7/2 minus 7/8 equals to 21/8 in fraction form.
Learn how to find what is 7/2 minus 7/8 in fraction form just in a few minutes. We have covered the easiest method to write 7/2 - 7/8 as a fraction and decimal.
Summary: 7/2 minus 7/8
Since both the fractions have the unequal denominators, you have to find the equivalent fractions for 7/2 and 7/8 having identical denominators before starting adding the fractions. Find the LCM of denominators, 8 is the LCM of 2 and 8. Multiply the LCM 8 with all the numerators and denominators of both fractions (7/2 x 8/8) - (7/8 x 8/8) and simplify further in order to have the common denominators. By simplifying the fraction subtraction expression becomes 21/8.
The below workout with step by step calculation shows how to find what is the difference between two fractions by subtracting a fraction 7/8 from 7/2. For different, unequal or unlike denominators, use any one of the following methods to find the equivalent fraction for 7/2 minus 7/8.
1. LCM method
2. Cross multiplication method.
7/2-7/8 using LCM Method:
What is 7/2 minus 7/8 as a fraction?
step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 7/2
Fraction B: 7/8
What to be found?
7/2-7/8 = ?
Find what's the difference between 7/2 and 7/8.
step 2 Compare the denominators of fractions 7/2 and 7/8 to identify whether it is a like or unlike fraction subtraction. Since the denominators of given fractions 7/2 and 7/8 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 7/2 and 7/8:
The LCM of 2 and 8 is 8.
step 4 Write the fractions 7/2 and 7/8 in the subtraction expression form and multiply LCM with all the numerators and denominators of both fractions.
=7/2-7/8
=(7 x 8)/(2 x 8)-(7 x 8)/(8 x 8)
step 5 Simplify the expression to have common denominator:
=28/8-7/8
step 6 Take the common values out and rewrite the above expression like the below:
=1/8 x (28/1-7/1)
=1/8 x (28 - 7)
step 7Simplify the above expression further:
=1/8 x 21
=21/8
7/2-7/8=21/8
Hence,
7/2 minus 7/8 equals to 21/8 in fraction.
7/2-7/8 using Cross Multiplication Method:
step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 7/2
Fraction B: 7/8
What to be found?
7/2-7/8 = ?
Find what's the difference between 7/2 and 7/8.
step 2 Find the product of numerator of Fraction A and denominator of Fraction B (7 x 8), find the product of numerator of Fraction B and denominator of Fraction A (7 x 2), and find the product of both denominators of Fraction A and Fraction B (2 x 8) and rewrite the equation as like the below:
= (7 x 8) - (7 x 2)/(2 x 8)
step 3 Simplify and rewrite the fraction:
= (56 - 14)/16
= 42/16
= 21/8
7/2-7/8 = 21/8
Hence,
7/2 minus 7/8 = 21/8