Subtract 70/7 from 6/21
1st number: 6/21, 2nd number: 10 0/7
6/21 - 70/7 is -68/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
6/21 = 6 × 1/21 × 1 = 6/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
70/7 = 70 × 3/7 × 3 = 210/21 - Subtract the two like fractions:
6/21 - 210/21 = 6 - 210/21 = -204/21 - After reducing the fraction, the answer is -68/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21-70/7 6/42-70/7 6/21-70/14 18/21-70/7 6/63-70/7 6/21-70/21 30/21-70/7 6/21-70/35 42/21-70/7 6/21-70/49