Subtract 42/15 from 9/28
1st number: 9/28, 2nd number: 2 12/15
9/28 - 42/15 is -347/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
9/28 = 9 × 15/28 × 15 = 135/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
42/15 = 42 × 28/15 × 28 = 1176/420 - Subtract the two like fractions:
135/420 - 1176/420 = 135 - 1176/420 = -1041/420 - After reducing the fraction, the answer is -347/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/28-42/15 9/28-84/15 9/56-42/15 9/28-42/30 27/28-42/15 9/84-42/15 9/28-42/45 45/28-42/15 9/28-42/75 63/28-42/15