Subtract 7/15 from 3/20
3/20 - 7/15 is -19/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
3/20 = 3 × 3/20 × 3 = 9/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
7/15 = 7 × 4/15 × 4 = 28/60 - Subtract the two like fractions:
9/60 - 28/60 = 9 - 28/60 = -19/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20-7/15 3/20-14/15 3/40-7/15 3/20-7/30 9/20-7/15 3/20-21/15 3/60-7/15 3/20-7/45 15/20-7/15 3/20-35/15 3/20-7/75 21/20-7/15 3/20-49/15