Subtract 7/84 from 28/12
1st number: 2 4/12, 2nd number: 7/84
28/12 - 7/84 is 9/4.
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,
28/12 = 28 × 7/12 × 7 = 196/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
7/84 = 7 × 1/84 × 1 = 7/84 - Subtract the two like fractions:
196/84 - 7/84 = 196 - 7/84 = 189/84 - After reducing the fraction, the answer is 9/4
- In mixed form: 21/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/12-7/84 28/12-14/84 28/24-7/84 84/12-7/84 28/12-21/84 28/36-7/84 28/12-35/84 28/60-7/84 28/12-49/84 28/84-7/84