Subtract 48/24 from 21/12
1st number: 1 9/12, 2nd number: 2 0/24
21/12 - 48/24 is -1/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 24 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 12 × 2 = 24,
21/12 = 21 × 2/12 × 2 = 42/24 - Likewise, for the 2nd fraction, since 24 × 1 = 24,
48/24 = 48 × 1/24 × 1 = 48/24 - Subtract the two like fractions:
42/24 - 48/24 = 42 - 48/24 = -6/24 - After reducing the fraction, the answer is -1/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12-48/24 21/12-96/24 21/24-48/24 63/12-48/24 21/36-48/24 21/12-48/72 21/60-48/24 21/84-48/24