Add 42/56 and 4/72
42/56 + 4/72 is 29/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 72 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 72 × 7 = 504,
4/72 = 4 × 7/72 × 7 = 28/504 - Add the two like fractions:
378/504 + 28/504 = 378 + 28/504 = 406/504 - 406/504 simplified gives 29/36
- So, 42/56 + 4/72 = 29/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/56+4/72 42/56+8/72 42/56+12/72 42/56+20/72 42/56+28/72