Subtract 4/28 from 90/12
1st number: 7 6/12, 2nd number: 4/28
90/12 - 4/28 is 103/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
90/12 = 90 × 7/12 × 7 = 630/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
4/28 = 4 × 3/28 × 3 = 12/84 - Subtract the two like fractions:
630/84 - 12/84 = 630 - 12/84 = 618/84 - After reducing the fraction, the answer is 103/14
- In mixed form: 75/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12-8/28 90/24-4/28 90/12-4/56 90/12-12/28 90/36-4/28 90/12-4/84 90/12-20/28 90/60-4/28 90/84-4/28