Subtract 90/14 from 10/21
1st number: 10/21, 2nd number: 6 6/14
10/21 - 90/14 is -125/21.
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,
90/14 = 90 × 3/14 × 3 = 270/42 - Subtract the two like fractions:
20/42 - 270/42 = 20 - 270/42 = -250/42 - After reducing the fraction, the answer is -125/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/21-90/14 10/42-90/14 10/21-90/28 30/21-90/14 10/63-90/14 10/21-90/42 50/21-90/14 10/21-90/70 70/21-90/14 10/21-90/98