Subtract 28/20 from 3/15
1st number: 3/15, 2nd number: 1 8/20
3/15 - 28/20 is -6/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
3/15 = 3 × 4/15 × 4 = 12/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
28/20 = 28 × 3/20 × 3 = 84/60 - Subtract the two like fractions:
12/60 - 84/60 = 12 - 84/60 = -72/60 - After reducing the fraction, the answer is -6/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/15-28/20 3/15-56/20 3/30-28/20 3/15-28/40 9/15-28/20 3/15-84/20 3/45-28/20 3/15-28/60 3/75-28/20 21/15-28/20