Subtract 27/21 from 15/6
1st number: 2 3/6, 2nd number: 1 6/21
15/6 - 27/21 is 17/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
15/6 = 15 × 7/6 × 7 = 105/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
27/21 = 27 × 2/21 × 2 = 54/42 - Subtract the two like fractions:
105/42 - 54/42 = 105 - 54/42 = 51/42 - After reducing the fraction, the answer is 17/14
- In mixed form: 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/6-27/21 15/6-54/21 15/12-27/21 15/6-27/42 45/6-27/21 15/6-81/21 15/18-27/21 15/6-27/63 75/6-27/21 15/30-27/21 15/42-27/21