Subtract 21/7 from 7/70
1st number: 7/70, 2nd number: 3 0/7
7/70 - 21/7 is -29/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 7 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
7/70 = 7 × 1/70 × 1 = 7/70 - Likewise, for the 2nd fraction, since 7 × 10 = 70,
21/7 = 21 × 10/7 × 10 = 210/70 - Subtract the two like fractions:
7/70 - 210/70 = 7 - 210/70 = -203/70 - After reducing the fraction, the answer is -29/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/70-21/7 7/70-42/7 7/70-21/14 21/70-21/7 7/70-63/7 35/70-21/7 7/70-21/35 49/70-21/7 7/70-21/49