Subtract 15/7 from 90/28
1st number: 3 6/28, 2nd number: 2 1/7
90/28 - 15/7 is 15/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 7 is 28
Next, find the equivalent fraction of both fractional numbers with denominator 28 - For the 1st fraction, since 28 × 1 = 28,
90/28 = 90 × 1/28 × 1 = 90/28 - Likewise, for the 2nd fraction, since 7 × 4 = 28,
15/7 = 15 × 4/7 × 4 = 60/28 - Subtract the two like fractions:
90/28 - 60/28 = 90 - 60/28 = 30/28 - After reducing the fraction, the answer is 15/14
- In mixed form: 11/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/28-30/7 90/56-15/7 90/28-15/14 90/28-45/7 90/84-15/7 90/28-15/21 90/28-75/7 90/28-15/35 90/28-15/49