Subtract 21/28 from 28/5
1st number: 5 3/5, 2nd number: 21/28
28/5 - 21/28 is 97/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 5 × 28 = 140,
28/5 = 28 × 28/5 × 28 = 784/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
21/28 = 21 × 5/28 × 5 = 105/140 - Subtract the two like fractions:
784/140 - 105/140 = 784 - 105/140 = 679/140 - After reducing the fraction, the answer is 97/20
- In mixed form: 417/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/5-21/28 28/5-42/28 28/10-21/28 28/5-21/56 84/5-21/28 28/5-63/28 28/15-21/28 28/5-21/84 28/25-21/28 28/35-21/28