Subtract 21/24 from 4/8
4/8 - 21/24 is -3/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 24 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 8 × 3 = 24,
4/8 = 4 × 3/8 × 3 = 12/24 - Likewise, for the 2nd fraction, since 24 × 1 = 24,
21/24 = 21 × 1/24 × 1 = 21/24 - Subtract the two like fractions:
12/24 - 21/24 = 12 - 21/24 = -9/24 - After reducing the fraction, the answer is -3/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/8-42/24 4/16-21/24 4/8-21/48 12/8-21/24 4/8-63/24 4/24-21/24 4/8-21/72 20/8-21/24 4/40-21/24 28/8-21/24 4/56-21/24