Subtract 90/14 from 21/6
1st number: 3 3/6, 2nd number: 6 6/14
21/6 - 90/14 is -41/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 14 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
21/6 = 21 × 7/6 × 7 = 147/42 - Likewise, for the 2nd fraction, since 14 × 3 = 42,
90/14 = 90 × 3/14 × 3 = 270/42 - Subtract the two like fractions:
147/42 - 270/42 = 147 - 270/42 = -123/42 - After reducing the fraction, the answer is -41/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/6-90/14 21/12-90/14 21/6-90/28 63/6-90/14 21/18-90/14 21/6-90/42 21/30-90/14 21/6-90/70 21/42-90/14 21/6-90/98