Subtract 49/70 from 15/56
15/56 - 49/70 is -121/280.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
15/56 = 15 × 5/56 × 5 = 75/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
49/70 = 49 × 4/70 × 4 = 196/280 - Subtract the two like fractions:
75/280 - 196/280 = 75 - 196/280 = -121/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/56-49/70 15/56-98/70 45/56-49/70 75/56-49/70