Subtract 84/28 from 3/12
1st number: 3/12, 2nd number: 3 0/28
3/12 - 84/28 is -11/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 28 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 28 × 3 = 84,
84/28 = 84 × 3/28 × 3 = 252/84 - Subtract the two like fractions:
21/84 - 252/84 = 21 - 252/84 = -231/84 - After reducing the fraction, the answer is -11/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12-84/28 3/24-84/28 3/12-84/56 9/12-84/28 3/36-84/28 15/12-84/28 3/60-84/28 21/12-84/28 3/84-84/28