Subtract 7/28 from 20/15
1st number: 1 5/15, 2nd number: 7/28
20/15 - 7/28 is 13/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
20/15 = 20 × 28/15 × 28 = 560/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
7/28 = 7 × 15/28 × 15 = 105/420 - Subtract the two like fractions:
560/420 - 105/420 = 560 - 105/420 = 455/420 - After reducing the fraction, the answer is 13/12
- In mixed form: 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15-7/28 20/15-14/28 20/30-7/28 20/15-7/56 60/15-7/28 20/15-21/28 20/45-7/28 20/15-7/84 20/15-35/28 20/75-7/28 20/15-49/28