Subtract 15/12 from 4/20
1st number: 4/20, 2nd number: 1 3/12
4/20 - 15/12 is -21/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
4/20 = 4 × 3/20 × 3 = 12/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
15/12 = 15 × 5/12 × 5 = 75/60 - Subtract the two like fractions:
12/60 - 75/60 = 12 - 75/60 = -63/60 - After reducing the fraction, the answer is -21/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/20-15/12 4/20-30/12 4/40-15/12 4/20-15/24 12/20-15/12 4/20-45/12 4/60-15/12 4/20-15/36 4/20-75/12 4/20-15/60 28/20-15/12 4/20-15/84