Subtract 20/35 from 4/28
4/28 - 20/35 is -3/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 35 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 35 × 4 = 140,
20/35 = 20 × 4/35 × 4 = 80/140 - Subtract the two like fractions:
20/140 - 80/140 = 20 - 80/140 = -60/140 - After reducing the fraction, the answer is -3/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/28-20/35 4/28-40/35 4/56-20/35 4/28-20/70 12/28-20/35 4/28-60/35 4/84-20/35 20/28-20/35