Subtract 30/12 from 12/15
1st number: 12/15, 2nd number: 2 6/12
12/15 - 30/12 is -17/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
12/15 = 12 × 4/15 × 4 = 48/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
30/12 = 30 × 5/12 × 5 = 150/60 - Subtract the two like fractions:
48/60 - 150/60 = 48 - 150/60 = -102/60 - After reducing the fraction, the answer is -17/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15-30/12 12/15-60/12 12/30-30/12 12/15-30/24 36/15-30/12 12/15-90/12 12/45-30/12 12/15-30/36 60/15-30/12 12/75-30/12 12/15-30/60 84/15-30/12 12/15-30/84