Subtract 21/5 from 4/28
1st number: 4/28, 2nd number: 4 1/5
4/28 - 21/5 is -142/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 5 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
4/28 = 4 × 5/28 × 5 = 20/140 - Likewise, for the 2nd fraction, since 5 × 28 = 140,
21/5 = 21 × 28/5 × 28 = 588/140 - Subtract the two like fractions:
20/140 - 588/140 = 20 - 588/140 = -568/140 - After reducing the fraction, the answer is -142/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/28-21/5 4/28-42/5 4/56-21/5 4/28-21/10 12/28-21/5 4/28-63/5 4/84-21/5 4/28-21/15 20/28-21/5 4/28-21/25 4/28-21/35