Subtract 8/24 from 21/28
21/28 - 8/24 is 5/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 24 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 28 × 6 = 168,
21/28 = 21 × 6/28 × 6 = 126/168 - Likewise, for the 2nd fraction, since 24 × 7 = 168,
8/24 = 8 × 7/24 × 7 = 56/168 - Subtract the two like fractions:
126/168 - 56/168 = 126 - 56/168 = 70/168 - After reducing the fraction, the answer is 5/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28-8/24 21/28-16/24 21/56-8/24 21/28-8/48 63/28-8/24 21/84-8/24 21/28-8/72 21/28-40/24 21/28-56/24