Subtract 4/56 from 5/21
5/21 - 4/56 is 1/6.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 56 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
5/21 = 5 × 8/21 × 8 = 40/168 - Likewise, for the 2nd fraction, since 56 × 3 = 168,
4/56 = 4 × 3/56 × 3 = 12/168 - Subtract the two like fractions:
40/168 - 12/168 = 40 - 12/168 = 28/168 - After reducing the fraction, the answer is 1/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21-4/56 5/21-8/56 5/42-4/56 15/21-4/56 5/21-12/56 5/63-4/56 25/21-4/56 5/21-20/56 35/21-4/56 5/21-28/56