Subtract 15/14 from 90/12
1st number: 7 6/12, 2nd number: 1 1/14
90/12 - 15/14 is 45/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 14 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 14 × 6 = 84,
15/14 = 15 × 6/14 × 6 = 90/84 - Subtract the two like fractions:
630/84 - 90/84 = 630 - 90/84 = 540/84 - After reducing the fraction, the answer is 45/7
- In mixed form: 63/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12-30/14 90/24-15/14 90/12-15/28 90/12-45/14 90/36-15/14 90/12-15/42 90/12-75/14 90/60-15/14 90/12-15/70 90/84-15/14 90/12-15/98