Subtract 10/30 from 7/21
7/21 - 10/30 is 0/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
7/21 = 7 × 10/21 × 10 = 70/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
10/30 = 10 × 7/30 × 7 = 70/210 - Subtract the two like fractions:
70/210 - 70/210 = 70 - 70/210 = 0/210 - The answer is 0
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21-10/30 7/21-20/30 7/42-10/30 7/21-10/60 7/63-10/30 7/21-10/90 35/21-10/30 7/21-50/30 49/21-10/30 7/21-70/30