Subtract 27/12 from 15/30
1st number: 15/30, 2nd number: 2 3/12
15/30 - 27/12 is -7/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 30 × 2 = 60,
15/30 = 15 × 2/30 × 2 = 30/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
27/12 = 27 × 5/12 × 5 = 135/60 - Subtract the two like fractions:
30/60 - 135/60 = 30 - 135/60 = -105/60 - After reducing the fraction, the answer is -7/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30-54/12 15/60-27/12 15/30-27/24 45/30-27/12 15/30-81/12 15/90-27/12 15/30-27/36 75/30-27/12 15/30-27/60 15/30-27/84