Subtract 27/21 from 9/3
1st number: 3 0/3, 2nd number: 1 6/21
9/3 - 27/21 is 12/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 21 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
9/3 = 9 × 7/3 × 7 = 63/21 - Likewise, for the 2nd fraction, since 21 × 1 = 21,
27/21 = 27 × 1/21 × 1 = 27/21 - Subtract the two like fractions:
63/21 - 27/21 = 63 - 27/21 = 36/21 - After reducing the fraction, the answer is 12/7
- In mixed form: 15/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/3-27/21 9/3-54/21 9/6-27/21 9/3-27/42 27/3-27/21 9/3-81/21 9/3-27/63 45/3-27/21 9/15-27/21 63/3-27/21 9/21-27/21