Subtract 7/21 from 7/10
710 - 721 is 1130.
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,
710 = 7 × 2110 × 21 = 147210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
721 = 7 × 1021 × 10 = 70210 - Subtract the two like fractions:
147210 - 70210 = 147 - 70210 = 77210 - After reducing the fraction, the answer is 1130
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/10-7/21 7/10-14/21 7/20-7/21 7/10-7/42 21/10-7/21 7/30-7/21 7/10-7/63 35/10-7/21 7/10-35/21 7/50-7/21 49/10-7/21 7/10-49/21 7/70-7/21