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