Subtract 49/28 from 42/15
1st number: 2 12/15, 2nd number: 1 21/28
42/15 - 49/28 is 21/20.
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,
42/15 = 42 × 28/15 × 28 = 1176/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
49/28 = 49 × 15/28 × 15 = 735/420 - Subtract the two like fractions:
1176/420 - 735/420 = 1176 - 735/420 = 441/420 - After reducing the fraction, the answer is 21/20
- In mixed form: 11/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/15-49/28 42/15-98/28 42/30-49/28 42/15-49/56 42/45-49/28 42/15-49/84 42/75-49/28