Subtract 21/6 from 1/2
1st number: 1/2, 2nd number: 3 3/6
1/2 - 21/6 is -3/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 6 is 6
Next, find the equivalent fraction of both fractional numbers with denominator 6 - For the 1st fraction, since 2 × 3 = 6,
1/2 = 1 × 3/2 × 3 = 3/6 - Likewise, for the 2nd fraction, since 6 × 1 = 6,
21/6 = 21 × 1/6 × 1 = 21/6 - Subtract the two like fractions:
3/6 - 21/6 = 3 - 21/6 = -18/6 - After reducing the fraction, the answer is -3/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 1/2-42/6 1/4-21/6 1/2-21/12 3/2-21/6 1/2-63/6 1/6-21/6 1/2-21/18 5/2-21/6 1/10-21/6 1/2-21/30 7/2-21/6 1/14-21/6 1/2-21/42