Subtract 27/24 from 8/21
1st number: 8/21, 2nd number: 1 3/24
8/21 - 27/24 is -125/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
8/21 = 8 × 8/21 × 8 = 64/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
27/24 = 27 × 7/24 × 7 = 189/168 - Subtract the two like fractions:
64/168 - 189/168 = 64 - 189/168 = -125/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/21-27/24 8/21-54/24 8/42-27/24 8/21-27/48 24/21-27/24 8/21-81/24 8/63-27/24 8/21-27/72 40/21-27/24 56/21-27/24