Subtract 3/15 from 3/12
3/12 - 3/15 is 1/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
3/12 = 3 × 5/12 × 5 = 15/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
3/15 = 3 × 4/15 × 4 = 12/60 - Subtract the two like fractions:
15/60 - 12/60 = 15 - 12/60 = 3/60 - After reducing the fraction, the answer is 1/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/12-3/15 3/12-6/15 3/24-3/15 3/12-3/30 9/12-3/15 3/12-9/15 3/36-3/15 3/12-3/45 15/12-3/15 3/60-3/15 3/12-3/75 21/12-3/15 3/12-21/15 3/84-3/15