Subtract 3/28 from 90/12
1st number: 7 6/12, 2nd number: 3/28
90/12 - 3/28 is 207/28.
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,
3/28 = 3 × 3/28 × 3 = 9/84 - Subtract the two like fractions:
630/84 - 9/84 = 630 - 9/84 = 621/84 - After reducing the fraction, the answer is 207/28
- In mixed form: 711/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12-6/28 90/24-3/28 90/12-3/56 90/12-9/28 90/36-3/28 90/12-3/84 90/12-15/28 90/60-3/28 90/12-21/28 90/84-3/28