Subtract 27/10 from 6/21
1st number: 6/21, 2nd number: 2 7/10
6/21 - 27/10 is -169/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
6/21 = 6 × 10/21 × 10 = 60/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
27/10 = 27 × 21/10 × 21 = 567/210 - Subtract the two like fractions:
60/210 - 567/210 = 60 - 567/210 = -507/210 - After reducing the fraction, the answer is -169/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/21-27/10 6/21-54/10 6/42-27/10 6/21-27/20 18/21-27/10 6/21-81/10 6/63-27/10 6/21-27/30 30/21-27/10 6/21-27/50 42/21-27/10 6/21-27/70