Subtract 30/9 from 15/12
1st number: 1 3/12, 2nd number: 3 3/9
1512 - 309 is -2512.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 12 × 3 = 36,
1512 = 15 × 312 × 3 = 4536 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
309 = 30 × 49 × 4 = 12036 - Subtract the two like fractions:
4536 - 12036 = 45 - 12036 = -7536 - After reducing the fraction, the answer is -2512
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/12-30/9 15/12-60/9 15/24-30/9 15/12-30/18 45/12-30/9 15/12-90/9 15/36-30/9 15/12-30/27 75/12-30/9 15/60-30/9 15/12-30/45 15/84-30/9 15/12-30/63