Subtract 3/12 from 21/24
21/24 - 3/12 is 5/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 12 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 24 × 1 = 24,
21/24 = 21 × 1/24 × 1 = 21/24 - Likewise, for the 2nd fraction, since 12 × 2 = 24,
3/12 = 3 × 2/12 × 2 = 6/24 - Subtract the two like fractions:
21/24 - 6/24 = 21 - 6/24 = 15/24 - After reducing the fraction, the answer is 5/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24-3/12 21/24-6/12 21/48-3/12 21/24-3/24 63/24-3/12 21/24-9/12 21/72-3/12 21/24-3/36 21/24-15/12 21/24-3/60 21/24-21/12 21/24-3/84