Subtract 1/12 from 10/21
10/21 - 1/12 is 11/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 12 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
10/21 = 10 × 4/21 × 4 = 40/84 - Likewise, for the 2nd fraction, since 12 × 7 = 84,
1/12 = 1 × 7/12 × 7 = 7/84 - Subtract the two like fractions:
40/84 - 7/84 = 40 - 7/84 = 33/84 - After reducing the fraction, the answer is 11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/21-1/12 10/21-2/12 10/42-1/12 10/21-1/24 30/21-1/12 10/21-3/12 10/63-1/12 10/21-1/36 50/21-1/12 10/21-5/12 10/21-1/60 70/21-1/12 10/21-7/12 10/21-1/84