Subtract 9/27 from 42/12
1st number: 3 6/12, 2nd number: 9/27
42/12 - 9/27 is 19/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 27 is 108
Next, find the equivalent fraction of both fractional numbers with denominator 108 - For the 1st fraction, since 12 × 9 = 108,
42/12 = 42 × 9/12 × 9 = 378/108 - Likewise, for the 2nd fraction, since 27 × 4 = 108,
9/27 = 9 × 4/27 × 4 = 36/108 - Subtract the two like fractions:
378/108 - 36/108 = 378 - 36/108 = 342/108 - After reducing the fraction, the answer is 19/6
- In mixed form: 31/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12-9/27 42/12-18/27 42/24-9/27 42/12-9/54 42/36-9/27 42/12-9/81 42/12-45/27 42/60-9/27 42/12-63/27 42/84-9/27