Subtract 15/48 from 21/12
1st number: 1 9/12, 2nd number: 15/48
21/12 - 15/48 is 23/16.
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,
15/48 = 15 × 1/48 × 1 = 15/48 - Subtract the two like fractions:
84/48 - 15/48 = 84 - 15/48 = 69/48 - After reducing the fraction, the answer is 23/16
- In mixed form: 17/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12-15/48 21/12-30/48 21/24-15/48 21/12-15/96 63/12-15/48 21/12-45/48 21/36-15/48 21/12-75/48 21/60-15/48 21/84-15/48