Subtract 18/10 from 21/14
1st number: 1 7/14, 2nd number: 1 8/10
21/14 - 18/10 is -3/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 14 × 5 = 70,
21/14 = 21 × 5/14 × 5 = 105/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
18/10 = 18 × 7/10 × 7 = 126/70 - Subtract the two like fractions:
105/70 - 126/70 = 105 - 126/70 = -21/70 - After reducing the fraction, the answer is -3/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/14-18/10 21/14-36/10 21/28-18/10 21/14-18/20 63/14-18/10 21/14-54/10 21/42-18/10 21/14-18/30 21/14-90/10 21/70-18/10 21/14-18/50 21/98-18/10 21/14-18/70