Subtract 20/28 from 1/15
1/15 - 20/28 is -68/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
1/15 = 1 × 28/15 × 28 = 28/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
20/28 = 20 × 15/28 × 15 = 300/420 - Subtract the two like fractions:
28/420 - 300/420 = 28 - 300/420 = -272/420 - After reducing the fraction, the answer is -68/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/15-20/28 1/15-40/28 1/30-20/28 1/15-20/56 3/15-20/28 1/15-60/28 1/45-20/28 1/15-20/84 5/15-20/28 1/75-20/28 7/15-20/28