What is 3/7 minus 1/3 in fraction?
3/7 minus 1/3 equals to 2/21 in fraction form.
Learn how to find what is 3/7 minus 1/3 in fraction form just in a few minutes. We have covered the easiest method to write 3/7 - 1/3 as a fraction and decimal.
Summary: 3/7 minus 1/3
Since both the fractions have the unequal denominators, you have to find the equivalent fractions for 3/7 and 1/3 having identical denominators before starting adding the fractions. Find the LCM of denominators, 21 is the LCM of 7 and 3. Multiply the LCM 21 with all the numerators and denominators of both fractions (3/7 x 21/21) - (1/3 x 21/21) and simplify further in order to have the common denominators. By simplifying the fraction subtraction expression becomes 2/21.
The below workout with step by step calculation shows how to find what is the difference between two fractions by subtracting a fraction 1/3 from 3/7. For different, unequal or unlike denominators, use any one of the following methods to find the equivalent fraction for 3/7 minus 1/3.
1. LCM method
2. Cross multiplication method.
3/7-1/3 using LCM Method:
What is 3/7 minus 1/3 as a fraction?
step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 3/7
Fraction B: 1/3
What to be found?
3/7-1/3 = ?
Find what's the difference between 3/7 and 1/3.
step 2 Compare the denominators of fractions 3/7 and 1/3 to identify whether it is a like or unlike fraction subtraction. Since the denominators of given fractions 3/7 and 1/3 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 3/7 and 1/3:
The LCM of 7 and 3 is 21.
step 4 Write the fractions 3/7 and 1/3 in the subtraction expression form and multiply LCM with all the numerators and denominators of both fractions.
=3/7-1/3
=(3 x 21)/(7 x 21)-(1 x 21)/(3 x 21)
step 5 Simplify the expression to have common denominator:
=9/21-7/21
step 6 Take the common values out and rewrite the above expression like the below:
=1/21 x (9/1-7/1)
=1/21 x (9 - 7)
step 7Simplify the above expression further:
=1/21 x 2
=2/21
3/7-1/3=2/21
Hence,
3/7 minus 1/3 equals to 2/21 in fraction.
3/7-1/3 using Cross Multiplication Method:
step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 3/7
Fraction B: 1/3
What to be found?
3/7-1/3 = ?
Find what's the difference between 3/7 and 1/3.
step 2 Find the product of numerator of Fraction A and denominator of Fraction B (3 x 3), find the product of numerator of Fraction B and denominator of Fraction A (1 x 7), and find the product of both denominators of Fraction A and Fraction B (7 x 3) and rewrite the equation as like the below:
= (3 x 3) - (1 x 7)/(7 x 3)
step 3 Simplify and rewrite the fraction:
= (9 - 7)/21
3/7-1/3 = 2/21
Hence,
3/7 minus 1/3 = 2/21