Subtract 40/14 from 10/21
1st number: 10/21, 2nd number: 2 12/14
10/21 - 40/14 is -50/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
10/21 = 10 × 2/21 × 2 = 20/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
40/14 = 40 × 3/14 × 3 = 120/42 - Subtract the two like fractions:
20/42 - 120/42 = 20 - 120/42 = -100/42 - After reducing the fraction, the answer is -50/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/21-40/14 10/21-80/14 10/42-40/14 10/21-40/28 30/21-40/14 10/63-40/14 10/21-40/42 50/21-40/14 10/21-40/70 70/21-40/14 10/21-40/98