Subtract 9/6 from 12/21
1st number: 12/21, 2nd number: 1 3/6
12/21 - 9/6 is -13/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
12/21 = 12 × 2/21 × 2 = 24/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
9/6 = 9 × 7/6 × 7 = 63/42 - Subtract the two like fractions:
24/42 - 63/42 = 24 - 63/42 = -39/42 - After reducing the fraction, the answer is -13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21-9/6 12/21-18/6 12/42-9/6 12/21-9/12 36/21-9/6 12/21-27/6 12/63-9/6 12/21-9/18 60/21-9/6 12/21-45/6 12/21-9/30 84/21-9/6 12/21-63/6 12/21-9/42