Subtract 48/15 from 1/21
1st number: 1/21, 2nd number: 3 3/15
1/21 - 48/15 is -331/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
1/21 = 1 × 5/21 × 5 = 5/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
48/15 = 48 × 7/15 × 7 = 336/105 - Subtract the two like fractions:
5/105 - 336/105 = 5 - 336/105 = -331/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21-48/15 1/21-96/15 1/42-48/15 1/21-48/30 3/21-48/15 1/63-48/15 1/21-48/45 5/21-48/15 1/21-48/75 7/21-48/15