15 - 17/18 as a fraction

Learn how to find what is 15 minus 17/18 in fraction form just in a few minutes. We have covered the easiest method to write 15 - 17/18 as a fraction and decimal.

Summary: 15 minus 17/18 = 253/18
Since both fractions have unequal denominators, 15 minus 17/18 is an unlike fractions subtraction. For subtracting unlike fractions, you have to first find the equivalent fractions for fraction 15 and fraction 17/18 in order to have the same denominators for both fractions. Therefore, you have to find the LCM of denominators 1 and 18. 18 is the LCM of 1 and 18. Multiplying the LCM 18 with the numerators and denominators of both fractions (15 x 18/18) - (17/18 x 18/18), and simplify further in order to have the common denominator. So the equivalent fraction for 15 is 270/18 and for 17/18 is 17/18. By simplifying this fraction subtraction 270/18 - 17/18, it becomes 253/18.

CALCULATION: 15 - 17/18 as a fraction
15 - 17/18 = (?)
15/1 - 17/18 = [(15 x 18) - (17 x 1)]/(1 x 18)
= (270 - 17)/18
= 253/18
15 - 17/18 = 253/18
15 minus 17/18 as a fraction is 253/18.

where
15 is a whole number as a minuend,
17/18 is a proper fraction as a subtrahend,
253/18 is the difference between 15 and 17/18.

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15 minus 17/18 as a decimal
15 - 17/18 = 253/18
253/18 = 14.0556
(15) - (17/18) as a decimal is 14.0556

where
14.0556 is the difference between 15 and 17/18.

The below workout with step by step calculation shows how to find what is the difference between two fractions by subtracting a fraction 17/18 from 15. For different, unequal or unlike denominators, use any one of the following methods to find the equivalent fraction for 15 minus 17/18.
1. LCM method
2. Cross multiplication method.

(15) - (17/18) using LCM Method:
What is 15 minus 17/18 as a fraction?

step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 15/1
Fraction B: 17/18

What to be found?
(15) - (17/18) = ?
Find what's the difference between 15 and 17/18.

step 2 Compare the denominators of fractions 15 and 17/18 to identify whether it is a like or unlike fraction subtraction. Since the denominators of given fractions 15 and 17/18 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 15 and 17/18:
The LCM of 1 and 18 is 18.

step 4 Write the fractions 15 and 17/18 in the subtraction expression form and multiply LCM with all the numerators and denominators of both fractions.
= 15 - 17/18
= [(15 x 18)/(1 x 18)] - [(17 x 18)/(18 x 18)]

step 5 Simplify the expression to have common denominator:
= 270/18 - 17/18

step 6 Take the common values out and rewrite the above expression like the below:
= 1/18 x (270/1 - 17/1)
= 1/18 x (270 - 17)

step 7Simplify the above expression further:
= 1/18 x 253
= 253/18
15 - 17/18 = 253/18

Hence,
15 minus 17/18 as a fraction is 253/18.

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15 - 17/18 using Cross Multiplication Method:
step 1 Observe the input parameters and what to be found:
Input:
Fraction A: 15/1
Fraction B: 17/18

What to be found?
(15)-(17/18) = ?
Find what's the difference between 15 and 17/18.

step 2 Find the product of numerator of Fraction A and denominator of Fraction B (15 x 18), find the product of numerator of Fraction B and denominator of Fraction A (17 x 1), and find the product of both denominators of Fraction A and Fraction B (1 x 18) and rewrite the equation as like the below:
= (15 x 18) - (17 x 1)/(1 x 18)

step 3 Simplify and rewrite the fraction:
= (270 - 17)/18
15 - 17/18 = 253/18

Hence,
15 minus 17/18 in fraction is 253/18