Subtract 15/20 from 1/3
1/3 - 15/20 is -5/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 3 × 20 = 60,
1/3 = 1 × 20/3 × 20 = 20/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
15/20 = 15 × 3/20 × 3 = 45/60 - Subtract the two like fractions:
20/60 - 45/60 = 20 - 45/60 = -25/60 - After reducing the fraction, the answer is -5/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/3-15/20 1/3-30/20 1/6-15/20 1/3-15/40 1/3-45/20 1/9-15/20 1/3-15/60 5/3-15/20 1/3-75/20 1/15-15/20 7/3-15/20 1/21-15/20