Subtract 40/27 from 21/2
1st number: 10 1/2, 2nd number: 1 13/27
21/2 - 40/27 is 487/54.
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,
40/27 = 40 × 2/27 × 2 = 80/54 - Subtract the two like fractions:
567/54 - 80/54 = 567 - 80/54 = 487/54 - In mixed form: 91/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/2-40/27 21/2-80/27 21/4-40/27 21/2-40/54 63/2-40/27 21/6-40/27 21/2-40/81 21/10-40/27 21/14-40/27