Subtract 21/27 from 28/4
1st number: 7 0/4, 2nd number: 21/27
28/4 - 21/27 is 56/9.
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,
28/4 = 28 × 27/4 × 27 = 756/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
21/27 = 21 × 4/27 × 4 = 84/108 - Subtract the two like fractions:
756/108 - 84/108 = 756 - 84/108 = 672/108 - After reducing the fraction, the answer is 56/9
- In mixed form: 62/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/4-21/27 28/4-42/27 28/8-21/27 28/4-21/54 84/4-21/27 28/4-63/27 28/12-21/27 28/4-21/81 28/20-21/27