Subtract 18/14 from 2/21
1st number: 2/21, 2nd number: 1 4/14
2/21 - 18/14 is -25/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
2/21 = 2 × 2/21 × 2 = 4/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
18/14 = 18 × 3/14 × 3 = 54/42 - Subtract the two like fractions:
4/42 - 54/42 = 4 - 54/42 = -50/42 - After reducing the fraction, the answer is -25/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/21-18/14 2/21-36/14 2/42-18/14 2/21-18/28 6/21-18/14 2/21-54/14 2/63-18/14 2/21-18/42 10/21-18/14 2/21-90/14 2/21-18/70 14/21-18/14 2/21-18/98