Subtract 15/8 from 49/21
1st number: 2 7/21, 2nd number: 1 7/8
49/21 - 15/8 is 11/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
49/21 = 49 × 8/21 × 8 = 392/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
15/8 = 15 × 21/8 × 21 = 315/168 - Subtract the two like fractions:
392/168 - 315/168 = 392 - 315/168 = 77/168 - After reducing the fraction, the answer is 11/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/21-15/8 49/21-30/8 49/42-15/8 49/21-15/16 49/21-45/8 49/63-15/8 49/21-15/24 49/21-75/8 49/21-15/40 49/21-15/56