Subtract 21/14 from 18/6
1st number: 3 0/6, 2nd number: 1 7/14
18/6 - 21/14 is 3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
18/6 = 18 × 7/6 × 7 = 126/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
21/14 = 21 × 3/14 × 3 = 63/42 - Subtract the two like fractions:
126/42 - 63/42 = 126 - 63/42 = 63/42 - After reducing the fraction, the answer is 3/2
- In mixed form: 11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/6-21/14 18/6-42/14 18/12-21/14 18/6-21/28 54/6-21/14 18/6-63/14 18/6-21/42 90/6-21/14 18/30-21/14 18/6-21/70 18/42-21/14 18/6-21/98