Subtract 42/14 from 21/10
1st number: 2 1/10, 2nd number: 3 0/14
21/10 - 42/14 is -9/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 14 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 10 × 7 = 70,
21/10 = 21 × 7/10 × 7 = 147/70 - Likewise, for the 2nd fraction, since 14 × 5 = 70,
42/14 = 42 × 5/14 × 5 = 210/70 - Subtract the two like fractions:
147/70 - 210/70 = 147 - 210/70 = -63/70 - After reducing the fraction, the answer is -9/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-42/14 21/10-84/14 21/20-42/14 21/10-42/28 63/10-42/14 21/30-42/14 21/50-42/14 21/10-42/70 21/70-42/14 21/10-42/98