Subtract 6/7 from 3/12
3/12 - 6/7 is -17/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 7 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
3/12 = 3 × 7/12 × 7 = 21/84 - Likewise, for the 2nd fraction, since 7 × 12 = 84,
6/7 = 6 × 12/7 × 12 = 72/84 - Subtract the two like fractions:
21/84 - 72/84 = 21 - 72/84 = -51/84 - After reducing the fraction, the answer is -17/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12-6/7 3/12-12/7 3/24-6/7 3/12-6/14 9/12-6/7 3/12-18/7 3/36-6/7 3/12-6/21 15/12-6/7 3/12-30/7 3/60-6/7 3/12-6/35 21/12-6/7 3/12-42/7 3/84-6/7 3/12-6/49