Subtract 56/7 from 18/3
1st number: 6 0/3, 2nd number: 8 0/7
18/3 - 56/7 is -2/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 3 × 7 = 21,
18/3 = 18 × 7/3 × 7 = 126/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
56/7 = 56 × 3/7 × 3 = 168/21 - Subtract the two like fractions:
126/21 - 168/21 = 126 - 168/21 = -42/21 - After reducing the fraction, the answer is -2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/3-56/7 18/6-56/7 18/3-56/14 54/3-56/7 18/9-56/7 18/3-56/21 90/3-56/7 18/15-56/7 18/3-56/35 18/21-56/7 18/3-56/49