Subtract 7/21 from 56/18
1st number: 3 2/18, 2nd number: 7/21
56/18 - 7/21 is 25/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
56/18 = 56 × 7/18 × 7 = 392/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
7/21 = 7 × 6/21 × 6 = 42/126 - Subtract the two like fractions:
392/126 - 42/126 = 392 - 42/126 = 350/126 - After reducing the fraction, the answer is 25/9
- In mixed form: 27/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/18-14/21 56/36-7/21 56/18-7/42 56/54-7/21 56/18-7/63 56/18-35/21 56/90-7/21 56/18-49/21