Subtract 21/9 from 30/14
1st number: 2 2/14, 2nd number: 2 3/9
30/14 - 21/9 is -4/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 14 × 9 = 126,
30/14 = 30 × 9/14 × 9 = 270/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
21/9 = 21 × 14/9 × 14 = 294/126 - Subtract the two like fractions:
270/126 - 294/126 = 270 - 294/126 = -24/126 - After reducing the fraction, the answer is -4/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/14-21/9 30/14-42/9 30/28-21/9 30/14-21/18 90/14-21/9 30/14-63/9 30/42-21/9 30/14-21/27 30/70-21/9 30/14-21/45 30/98-21/9 30/14-21/63