Subtract 1/20 from 7/28
7/28 - 1/20 is 1/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
7/28 = 7 × 5/28 × 5 = 35/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
1/20 = 1 × 7/20 × 7 = 7/140 - Subtract the two like fractions:
35/140 - 7/140 = 35 - 7/140 = 28/140 - After reducing the fraction, the answer is 1/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28-1/20 7/28-2/20 7/56-1/20 7/28-1/40 21/28-1/20 7/28-3/20 7/84-1/20 7/28-1/60 35/28-1/20 7/28-5/20 49/28-1/20 7/28-7/20