Subtract 21/28 from 90/6
1st number: 15 0/6, 2nd number: 21/28
90/6 - 21/28 is 57/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 6 × 14 = 84,
90/6 = 90 × 14/6 × 14 = 1260/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
21/28 = 21 × 3/28 × 3 = 63/84 - Subtract the two like fractions:
1260/84 - 63/84 = 1260 - 63/84 = 1197/84 - After reducing the fraction, the answer is 57/4
- In mixed form: 141/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/6-42/28 90/12-21/28 90/6-21/56 90/6-63/28 90/18-21/28 90/6-21/84 90/30-21/28 90/42-21/28