Subtract 49/14 from 20/42
1st number: 20/42, 2nd number: 3 7/14
20/42 - 49/14 is -127/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
20/42 = 20 × 1/42 × 1 = 20/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
49/14 = 49 × 3/14 × 3 = 147/42 - Subtract the two like fractions:
20/42 - 147/42 = 20 - 147/42 = -127/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42-49/14 20/42-98/14 20/84-49/14 20/42-49/28 60/42-49/14 20/42-49/42 20/42-49/70 20/42-49/98