Subtract 21/24 from 4/12
4/12 - 21/24 is -13/24.
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,
4/12 = 4 × 2/12 × 2 = 8/24 - Likewise, for the 2nd fraction, since 24 × 1 = 24,
21/24 = 21 × 1/24 × 1 = 21/24 - Subtract the two like fractions:
8/24 - 21/24 = 8 - 21/24 = -13/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/12-21/24 4/12-42/24 4/24-21/24 4/12-21/48 4/12-63/24 4/36-21/24 4/12-21/72 20/12-21/24 4/60-21/24 28/12-21/24 4/84-21/24