Subtract 7/24 from 21/18
1st number: 1 3/18, 2nd number: 7/24
21/18 - 7/24 is 7/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 24 is 72
Next, find the equivalent fraction of both fractional numbers with denominator 72 - For the 1st fraction, since 18 × 4 = 72,
21/18 = 21 × 4/18 × 4 = 84/72 - Likewise, for the 2nd fraction, since 24 × 3 = 72,
7/24 = 7 × 3/24 × 3 = 21/72 - Subtract the two like fractions:
84/72 - 21/72 = 84 - 21/72 = 63/72 - After reducing the fraction, the answer is 7/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18-7/24 21/18-14/24 21/36-7/24 21/18-7/48 63/18-7/24 21/18-21/24 21/54-7/24 21/18-7/72 21/18-35/24 21/90-7/24 21/18-49/24