Subtract 1/28 from 1/12
1/12 - 1/28 is 1/21.
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,
1/12 = 1 × 7/12 × 7 = 7/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
1/28 = 1 × 3/28 × 3 = 3/84 - Subtract the two like fractions:
7/84 - 3/84 = 7 - 3/84 = 4/84 - After reducing the fraction, the answer is 1/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/12-1/28 1/12-2/28 1/24-1/28 1/12-1/56 3/12-1/28 1/12-3/28 1/36-1/28 1/12-1/84 5/12-1/28 1/12-5/28 1/60-1/28 7/12-1/28 1/12-7/28 1/84-1/28