Subtract 1/28 from 3/15
3/15 - 1/28 is 23/140.
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,
3/15 = 3 × 28/15 × 28 = 84/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
1/28 = 1 × 15/28 × 15 = 15/420 - Subtract the two like fractions:
84/420 - 15/420 = 84 - 15/420 = 69/420 - After reducing the fraction, the answer is 23/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15-1/28 3/15-2/28 3/30-1/28 3/15-1/56 9/15-1/28 3/15-3/28 3/45-1/28 3/15-1/84 3/15-5/28 3/75-1/28 21/15-1/28 3/15-7/28