Subtract 49/10 from 21/70
1st number: 21/70, 2nd number: 4 9/10
21/70 - 49/10 is -23/5.
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,
21/70 = 21 × 1/70 × 1 = 21/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
49/10 = 49 × 7/10 × 7 = 343/70 - Subtract the two like fractions:
21/70 - 343/70 = 21 - 343/70 = -322/70 - After reducing the fraction, the answer is -23/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70-49/10 21/70-98/10 21/70-49/20 63/70-49/10 21/70-49/30 21/70-49/50 21/70-49/70