Subtract 20/15 from 5/28
1st number: 5/28, 2nd number: 1 5/15
5/28 - 20/15 is -97/84.
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,
5/28 = 5 × 15/28 × 15 = 75/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
20/15 = 20 × 28/15 × 28 = 560/420 - Subtract the two like fractions:
75/420 - 560/420 = 75 - 560/420 = -485/420 - After reducing the fraction, the answer is -97/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/28-20/15 5/28-40/15 5/56-20/15 5/28-20/30 15/28-20/15 5/28-60/15 5/84-20/15 5/28-20/45 25/28-20/15 5/28-20/75 35/28-20/15