Subtract 7/15 from 18/12
1st number: 1 6/12, 2nd number: 7/15
18/12 - 7/15 is 31/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
18/12 = 18 × 5/12 × 5 = 90/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
7/15 = 7 × 4/15 × 4 = 28/60 - Subtract the two like fractions:
90/60 - 28/60 = 90 - 28/60 = 62/60 - After reducing the fraction, the answer is 31/30
- In mixed form: 11/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/12-7/15 18/12-14/15 18/24-7/15 18/12-7/30 54/12-7/15 18/12-21/15 18/36-7/15 18/12-7/45 90/12-7/15 18/12-35/15 18/60-7/15 18/12-7/75 18/12-49/15 18/84-7/15