Subtract 21/7 from 8/14
1st number: 8/14, 2nd number: 3 0/7
8/14 - 21/7 is -17/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 7 is 14
Next, find the equivalent fraction of both fractional numbers with denominator 14 - For the 1st fraction, since 14 × 1 = 14,
8/14 = 8 × 1/14 × 1 = 8/14 - Likewise, for the 2nd fraction, since 7 × 2 = 14,
21/7 = 21 × 2/7 × 2 = 42/14 - Subtract the two like fractions:
8/14 - 42/14 = 8 - 42/14 = -34/14 - After reducing the fraction, the answer is -17/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/14-21/7 8/14-42/7 8/28-21/7 8/14-21/14 24/14-21/7 8/14-63/7 8/42-21/7 40/14-21/7 8/70-21/7 8/14-21/35 56/14-21/7 8/98-21/7 8/14-21/49