Add 42/56 and 3/18
42/56 + 3/18 is 11/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 18 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 56 × 9 = 504,
42/56 = 42 × 9/56 × 9 = 378/504 - Likewise, for the 2nd fraction, since 18 × 28 = 504,
3/18 = 3 × 28/18 × 28 = 84/504 - Add the two like fractions:
378/504 + 84/504 = 378 + 84/504 = 462/504 - 462/504 simplified gives 11/12
- So, 42/56 + 3/18 = 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/56+3/18 42/56+6/18 42/56+3/36 42/56+9/18 42/56+3/54 42/56+15/18 42/56+3/90 42/56+21/18