Add 18/28 and 27/72
18/28 + 27/72 is 57/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 28 × 18 = 504,
18/28 = 18 × 18/28 × 18 = 324/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
27/72 = 27 × 7/72 × 7 = 189/504 - Add the two like fractions:
324/504 + 189/504 = 324 + 189/504 = 513/504 - 513/504 simplified gives 57/56
- So, 18/28 + 27/72 = 57/56
In mixed form: 11/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28+27/72 18/28+54/72 18/56+27/72 54/28+27/72 18/28+81/72 18/84+27/72 90/28+27/72