Subtract 6/12 from 21/3
1st number: 7 0/3, 2nd number: 6/12
21/3 - 6/12 is 13/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 3 × 4 = 12,
21/3 = 21 × 4/3 × 4 = 84/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
6/12 = 6 × 1/12 × 1 = 6/12 - Subtract the two like fractions:
84/12 - 6/12 = 84 - 6/12 = 78/12 - After reducing the fraction, the answer is 13/2
- In mixed form: 61/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/3-6/12 21/6-6/12 21/3-6/24 63/3-6/12 21/3-18/12 21/9-6/12 21/3-6/36 21/3-30/12 21/15-6/12 21/3-6/60 21/3-42/12 21/3-6/84