Subtract 9/24 from 21/10
1st number: 2 1/10, 2nd number: 9/24
21/10 - 9/24 is 69/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 24 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 10 × 12 = 120,
21/10 = 21 × 12/10 × 12 = 252/120 - Likewise, for the 2nd fraction, since 24 × 5 = 120,
9/24 = 9 × 5/24 × 5 = 45/120 - Subtract the two like fractions:
252/120 - 45/120 = 252 - 45/120 = 207/120 - After reducing the fraction, the answer is 69/40
- In mixed form: 129/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-9/24 21/10-18/24 21/20-9/24 21/10-9/48 63/10-9/24 21/10-27/24 21/30-9/24 21/10-9/72 21/10-45/24 21/50-9/24 21/10-63/24 21/70-9/24