Subtract 21/28 from 90/14
1st number: 6 6/14, 2nd number: 21/28
90/14 - 21/28 is 159/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 28 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 14 × 2 = 28,
90/14 = 90 × 2/14 × 2 = 180/28 - Likewise, for the 2nd fraction, since 28 × 1 = 28,
21/28 = 21 × 1/28 × 1 = 21/28 - Subtract the two like fractions:
180/28 - 21/28 = 180 - 21/28 = 159/28 - In mixed form: 519/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/14-42/28 90/28-21/28 90/14-21/56 90/14-63/28 90/42-21/28 90/14-21/84 90/70-21/28 90/98-21/28