Subtract 21/10 from 49/70
1st number: 49/70, 2nd number: 2 1/10
49/70 - 21/10 is -7/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
49/70 = 49 × 1/70 × 1 = 49/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
21/10 = 21 × 7/10 × 7 = 147/70 - Subtract the two like fractions:
49/70 - 147/70 = 49 - 147/70 = -98/70 - After reducing the fraction, the answer is -7/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/70-21/10 49/70-42/10 49/70-21/20 49/70-63/10 49/70-21/30 49/70-21/50 49/70-21/70