Subtract 5/12 from 21/28
21/28 - 5/12 is 1/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
21/28 = 21 × 3/28 × 3 = 63/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
5/12 = 5 × 7/12 × 7 = 35/84 - Subtract the two like fractions:
63/84 - 35/84 = 63 - 35/84 = 28/84 - After reducing the fraction, the answer is 1/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28-5/12 21/28-10/12 21/56-5/12 21/28-5/24 63/28-5/12 21/28-15/12 21/84-5/12 21/28-5/36 21/28-25/12 21/28-5/60 21/28-35/12 21/28-5/84