What is 3/9 minus 1/7 in fraction?
3/9 minus 1/7 equals to 4/21 in fraction form.
3/9 - 1/7 in fraction form
Learn how to find what is 3/9 minus 1/7 in fraction form just in a few minutes. We have covered the easiest method to write 3/9 - 1/7 as a fraction and decimal.
Summary: 3/9 minus 1/7
Since both the fractions have the unequal denominators, you have to find the equivalent fractions for 3/9 and 1/7 having identical denominators before starting adding the fractions. Find the LCM of denominators, 63 is the LCM of 9 and 7. Multiply the LCM 63 with all the numerators and denominators of both fractions (3/9 x 63/63) - (1/7 x 63/63) and simplify further in order to have the common denominators. By simplifying the fraction subtraction expression becomes 12/63.
3/9-1/7 as a fraction
3/9 - 1/7 = (?)
3/9 - 1/7 = [(3 x 7) - (1 x 9)]/(9 x 7)
= (21 - 9)/63
= 12/63
= (3 x 4)/(3 x 21)
= 4/21
3/9 - 1/7 = 4/21
3/9 minus 1/7 as a fraction is 4/21.
where
3/9 is a fraction as a minuend,
1/7 is a fraction as a subtrahend,
4/21 is the difference between 3/9 and 1/7.
3/9 minus 1/7 as a decimal
3/9 - 1/7 = 4/21
4/21 = 0.1905
3/9-1/7 as a decimal is 0.1905
where
0.1905 is the difference between 3/9 and 1/7.
How to find 3/9-1/7 as a fraction?
The below workout with step by step calculation shows how to find what is the difference between two fractions by subtracting a fraction 1/7 from 3/9. For different, unequal or unlike denominators, use any one of the following methods to find the equivalent fraction for 3/9 minus 1/7.
1. LCM method
2. Cross multiplication method.
3/9-1/7 using LCM Method:
What is 3/9 minus 1/7 as a fraction?
step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 3/9
Fraction B: 1/7
What to be found?
3/9-1/7 = ?
Find what's the difference between 3/9 and 1/7.
step 2 Compare the denominators of fractions 3/9 and 1/7 to identify whether it is a like or unlike fraction subtraction. Since the denominators of given fractions 3/9 and 1/7 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 3/9 and 1/7:
The LCM of 9 and 7 is 63.
step 4 Write the fractions 3/9 and 1/7 in the subtraction expression form and multiply LCM with all the numerators and denominators of both fractions.
=3/9-1/7
=(3 x 63)/(9 x 63)-(1 x 63)/(7 x 63)
step 5 Simplify the expression to have common denominator:
=21/63-9/63
step 6 Take the common values out and rewrite the above expression like the below:
=1/63 x (21/1-9/1)
=1/63 x (21 - 9)
step 7Simplify the above expression further:
=1/63 x 12
= 12/63
=4/21
3/9-1/7=4/21
Hence,
3/9 minus 1/7 equals to 4/21 in fraction.
3/9-1/7 using Cross Multiplication Method:
step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 3/9
Fraction B: 1/7
What to be found?
3/9-1/7 = ?
Find what's the difference between 3/9 and 1/7.
step 2 Find the product of numerator of Fraction A and denominator of Fraction B (3 x 7), find the product of numerator of Fraction B and denominator of Fraction A (1 x 9), and find the product of both denominators of Fraction A and Fraction B (9 x 7) and rewrite the equation as like the below:
= (3 x 7) - (1 x 9)/(9 x 7)
step 3 Simplify and rewrite the fraction:
= (21 - 9)/63
= 12/63
= 4/21
3/9-1/7 = 4/21
Hence,
3/9 minus 1/7 = 4/21