Subtract 7/21 from 14/30
14/30 - 7/21 is 2/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
14/30 = 14 × 7/30 × 7 = 98/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
7/21 = 7 × 10/21 × 10 = 70/210 - Subtract the two like fractions:
98/210 - 70/210 = 98 - 70/210 = 28/210 - After reducing the fraction, the answer is 2/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/30-7/21 14/30-14/21 14/60-7/21 14/30-7/42 42/30-7/21 14/90-7/21 14/30-7/63 70/30-7/21 14/30-35/21 98/30-7/21 14/30-49/21