Subtract 9/28 from 9/15
9/15 - 9/28 is 39/140.
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,
9/15 = 9 × 28/15 × 28 = 252/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
9/28 = 9 × 15/28 × 15 = 135/420 - Subtract the two like fractions:
252/420 - 135/420 = 252 - 135/420 = 117/420 - After reducing the fraction, the answer is 39/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/15-9/28 9/15-18/28 9/30-9/28 9/15-9/56 27/15-9/28 9/15-27/28 9/45-9/28 9/15-9/84 45/15-9/28 9/15-45/28 9/75-9/28 63/15-9/28 9/15-63/28