Subtract 15/4 from 21/24
1st number: 21/24, 2nd number: 3 3/4
21/24 - 15/4 is -23/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 4 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 4 × 6 = 24,
15/4 = 15 × 6/4 × 6 = 90/24 - Subtract the two like fractions:
21/24 - 90/24 = 21 - 90/24 = -69/24 - After reducing the fraction, the answer is -23/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24-15/4 21/24-30/4 21/48-15/4 21/24-15/8 63/24-15/4 21/24-45/4 21/72-15/4 21/24-15/12 21/24-75/4 21/24-15/20 21/24-15/28