Subtract 28/21 from 24/8
1st number: 3 0/8, 2nd number: 1 7/21
24/8 - 28/21 is 5/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
24/8 = 24 × 21/8 × 21 = 504/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
28/21 = 28 × 8/21 × 8 = 224/168 - Subtract the two like fractions:
504/168 - 224/168 = 504 - 224/168 = 280/168 - After reducing the fraction, the answer is 5/3
- In mixed form: 12/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/8-28/21 24/8-56/21 24/16-28/21 24/8-28/42 72/8-28/21 24/8-84/21 24/8-28/63 24/40-28/21 24/56-28/21