Subtract 9/84 from 42/12
1st number: 3 6/12, 2nd number: 9/84
42/12 - 9/84 is 95/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
42/12 = 42 × 7/12 × 7 = 294/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
9/84 = 9 × 1/84 × 1 = 9/84 - Subtract the two like fractions:
294/84 - 9/84 = 294 - 9/84 = 285/84 - After reducing the fraction, the answer is 95/28
- In mixed form: 311/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/12-9/84 42/12-18/84 42/24-9/84 42/12-27/84 42/36-9/84 42/12-45/84 42/60-9/84 42/12-63/84 42/84-9/84