Subtract 49/15 from 16/21
1st number: 16/21, 2nd number: 3 4/15
16/21 - 49/15 is -263/105.
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,
16/21 = 16 × 5/21 × 5 = 80/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
49/15 = 49 × 7/15 × 7 = 343/105 - Subtract the two like fractions:
80/105 - 343/105 = 80 - 343/105 = -263/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21-49/15 16/21-98/15 16/42-49/15 16/21-49/30 48/21-49/15 16/63-49/15 16/21-49/45 80/21-49/15 16/21-49/75