Subtract 42/18 from 56/7
1st number: 8 0/7, 2nd number: 2 6/18
56/7 - 42/18 is 17/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
56/7 = 56 × 18/7 × 18 = 1008/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
42/18 = 42 × 7/18 × 7 = 294/126 - Subtract the two like fractions:
1008/126 - 294/126 = 1008 - 294/126 = 714/126 - After reducing the fraction, the answer is 17/3
- In mixed form: 52/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-84/18 56/14-42/18 56/7-42/36 56/21-42/18 56/7-42/54 56/35-42/18 56/7-42/90 56/49-42/18