Subtract 3/56 from 21/15
1st number: 1 6/15, 2nd number: 3/56
21/15 - 3/56 is 377/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 15 × 56 = 840,
21/15 = 21 × 56/15 × 56 = 1176/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
3/56 = 3 × 15/56 × 15 = 45/840 - Subtract the two like fractions:
1176/840 - 45/840 = 1176 - 45/840 = 1131/840 - After reducing the fraction, the answer is 377/280
- In mixed form: 197/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15-3/56 21/15-6/56 21/30-3/56 63/15-3/56 21/15-9/56 21/45-3/56 21/15-15/56 21/75-3/56 21/15-21/56