Subtract 9/8 from 24/21
1st number: 1 3/21, 2nd number: 1 1/8
24/21 - 9/8 is 1/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
24/21 = 24 × 8/21 × 8 = 192/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
9/8 = 9 × 21/8 × 21 = 189/168 - Subtract the two like fractions:
192/168 - 189/168 = 192 - 189/168 = 3/168 - After reducing the fraction, the answer is 1/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/21-9/8 24/21-18/8 24/42-9/8 24/21-9/16 72/21-9/8 24/21-27/8 24/63-9/8 24/21-9/24 24/21-45/8 24/21-9/40 24/21-63/8 24/21-9/56