Subtract 21/6 from 9/3
1st number: 3 0/3, 2nd number: 3 3/6
9/3 - 21/6 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 6 is 6
Next, find the equivalent fraction of both fractional numbers with denominator 6 - For the 1st fraction, since 3 × 2 = 6,
9/3 = 9 × 2/3 × 2 = 18/6 - Likewise, for the 2nd fraction, since 6 × 1 = 6,
21/6 = 21 × 1/6 × 1 = 21/6 - Subtract the two like fractions:
18/6 - 21/6 = 18 - 21/6 = -3/6 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/3-21/6 9/3-42/6 9/6-21/6 9/3-21/12 27/3-21/6 9/3-63/6 9/3-21/18 45/3-21/6 9/15-21/6 9/3-21/30 63/3-21/6 9/21-21/6 9/3-21/42