Subtract 1/56 from 21/18
1st number: 1 3/18, 2nd number: 1/56
21/18 - 1/56 is 193/168.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 18 × 28 = 504,
21/18 = 21 × 28/18 × 28 = 588/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
1/56 = 1 × 9/56 × 9 = 9/504 - Subtract the two like fractions:
588/504 - 9/504 = 588 - 9/504 = 579/504 - After reducing the fraction, the answer is 193/168
- In mixed form: 125/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/18-1/56 21/18-2/56 21/36-1/56 63/18-1/56 21/18-3/56 21/54-1/56 21/18-5/56 21/90-1/56 21/18-7/56