Subtract 21/84 from 18/14
1st number: 1 4/14, 2nd number: 21/84
18/14 - 21/84 is 29/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 14 × 6 = 84,
18/14 = 18 × 6/14 × 6 = 108/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
21/84 = 21 × 1/84 × 1 = 21/84 - Subtract the two like fractions:
108/84 - 21/84 = 108 - 21/84 = 87/84 - After reducing the fraction, the answer is 29/28
- In mixed form: 11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/14-21/84 18/14-42/84 18/28-21/84 54/14-21/84 18/14-63/84 18/42-21/84 90/14-21/84 18/70-21/84 18/98-21/84