Subtract 35/20 from 15/12
1st number: 1 3/12, 2nd number: 1 15/20
15/12 - 35/20 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 20 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 12 × 5 = 60,
15/12 = 15 × 5/12 × 5 = 75/60 - Likewise, for the 2nd fraction, since 20 × 3 = 60,
35/20 = 35 × 3/20 × 3 = 105/60 - Subtract the two like fractions:
75/60 - 105/60 = 75 - 105/60 = -30/60 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/12-35/20 15/12-70/20 15/24-35/20 15/12-35/40 45/12-35/20 15/36-35/20 15/12-35/60 75/12-35/20 15/60-35/20 15/84-35/20