Subtract 9/14 from 15/21
15/21 - 9/14 is 1/14.
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,
15/21 = 15 × 2/21 × 2 = 30/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
9/14 = 9 × 3/14 × 3 = 27/42 - Subtract the two like fractions:
30/42 - 27/42 = 30 - 27/42 = 3/42 - After reducing the fraction, the answer is 1/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21-9/14 15/21-18/14 15/42-9/14 15/21-9/28 45/21-9/14 15/21-27/14 15/63-9/14 15/21-9/42 75/21-9/14 15/21-45/14 15/21-9/70 15/21-63/14 15/21-9/98