Subtract 12/3 from 21/24
1st number: 21/24, 2nd number: 4 0/3
21/24 - 12/3 is -25/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 3 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 3 × 8 = 24,
12/3 = 12 × 8/3 × 8 = 96/24 - Subtract the two like fractions:
21/24 - 96/24 = 21 - 96/24 = -75/24 - After reducing the fraction, the answer is -25/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24-12/3 21/24-24/3 21/48-12/3 21/24-12/6 63/24-12/3 21/24-36/3 21/72-12/3 21/24-12/9 21/24-60/3 21/24-12/15 21/24-84/3 21/24-12/21