Subtract 28/21 from 28/5
1st number: 5 3/5, 2nd number: 1 7/21
28/5 - 28/21 is 64/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
28/5 = 28 × 21/5 × 21 = 588/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
28/21 = 28 × 5/21 × 5 = 140/105 - Subtract the two like fractions:
588/105 - 140/105 = 588 - 140/105 = 448/105 - After reducing the fraction, the answer is 64/15
- In mixed form: 44/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/5-28/21 28/5-56/21 28/10-28/21 28/5-28/42 84/5-28/21 28/5-84/21 28/15-28/21 28/5-28/63 28/25-28/21 28/35-28/21