Subtract 28/48 from 21/12
1st number: 1 9/12, 2nd number: 28/48
21/12 - 28/48 is 7/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 48 is 48
Next, find the equivalent fraction of both fractional numbers with denominator 48 - For the 1st fraction, since 12 × 4 = 48,
21/12 = 21 × 4/12 × 4 = 84/48 - Likewise, for the 2nd fraction, since 48 × 1 = 48,
28/48 = 28 × 1/48 × 1 = 28/48 - Subtract the two like fractions:
84/48 - 28/48 = 84 - 28/48 = 56/48 - After reducing the fraction, the answer is 7/6
- In mixed form: 11/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12-28/48 21/12-56/48 21/24-28/48 21/12-28/96 63/12-28/48 21/12-84/48 21/36-28/48 21/60-28/48 21/84-28/48