Subtract 42/56 from 6/18
6/18 - 42/56 is -5/12.
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,
6/18 = 6 × 28/18 × 28 = 168/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
42/56 = 42 × 9/56 × 9 = 378/504 - Subtract the two like fractions:
168/504 - 378/504 = 168 - 378/504 = -210/504 - After reducing the fraction, the answer is -5/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/18-42/56 6/18-84/56 6/36-42/56 6/54-42/56 30/18-42/56 6/90-42/56 42/18-42/56