Subtract 10/5 from 21/24
1st number: 21/24, 2nd number: 2 0/5
21/24 - 10/5 is -9/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 5 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 24 × 5 = 120,
21/24 = 21 × 5/24 × 5 = 105/120 - Likewise, for the 2nd fraction, since 5 × 24 = 120,
10/5 = 10 × 24/5 × 24 = 240/120 - Subtract the two like fractions:
105/120 - 240/120 = 105 - 240/120 = -135/120 - After reducing the fraction, the answer is -9/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/24-10/5 21/24-20/5 21/48-10/5 63/24-10/5 21/24-30/5 21/72-10/5 21/24-10/15 21/24-50/5 21/24-10/25 21/24-70/5 21/24-10/35