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