Subtract 30/27 from 21/2
1st number: 10 1/2, 2nd number: 1 3/27
21/2 - 30/27 is 169/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 27 is 54
Next, find the equivalent fraction of both fractional numbers with denominator 54 - For the 1st fraction, since 2 × 27 = 54,
21/2 = 21 × 27/2 × 27 = 567/54 - Likewise, for the 2nd fraction, since 27 × 2 = 54,
30/27 = 30 × 2/27 × 2 = 60/54 - Subtract the two like fractions:
567/54 - 60/54 = 567 - 60/54 = 507/54 - After reducing the fraction, the answer is 169/18
- In mixed form: 97/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2-30/27 21/2-60/27 21/4-30/27 21/2-30/54 63/2-30/27 21/2-90/27 21/6-30/27 21/2-30/81 21/10-30/27 21/14-30/27