Subtract 20/27 from 21/4
1st number: 5 1/4, 2nd number: 20/27
21/4 - 20/27 is 487/108.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 27 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 4 × 27 = 108,
21/4 = 21 × 27/4 × 27 = 567/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
20/27 = 20 × 4/27 × 4 = 80/108 - Subtract the two like fractions:
567/108 - 80/108 = 567 - 80/108 = 487/108 - In mixed form: 455/108
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4-20/27 21/4-40/27 21/8-20/27 21/4-20/54 63/4-20/27 21/4-60/27 21/12-20/27 21/4-20/81 21/20-20/27 21/28-20/27