Subtract 7/21 from 21/10
1st number: 2 1/10, 2nd number: 7/21
21/10 - 7/21 is 53/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
21/10 = 21 × 21/10 × 21 = 441/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
7/21 = 7 × 10/21 × 10 = 70/210 - Subtract the two like fractions:
441/210 - 70/210 = 441 - 70/210 = 371/210 - After reducing the fraction, the answer is 53/30
- In mixed form: 123/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-7/21 21/10-14/21 21/20-7/21 21/10-7/42 63/10-7/21 21/30-7/21 21/10-7/63 21/10-35/21 21/50-7/21 21/10-49/21 21/70-7/21