Subtract 20/28 from 4/15
4/15 - 20/28 is -47/105.
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,
4/15 = 4 × 28/15 × 28 = 112/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
20/28 = 20 × 15/28 × 15 = 300/420 - Subtract the two like fractions:
112/420 - 300/420 = 112 - 300/420 = -188/420 - After reducing the fraction, the answer is -47/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/15-20/28 4/15-40/28 4/30-20/28 4/15-20/56 12/15-20/28 4/15-60/28 4/45-20/28 4/15-20/84 20/15-20/28 4/75-20/28 28/15-20/28