Add 18/72 and 27/28
18/72 + 27/28 is 17/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 28 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
18/72 = 18 × 7/72 × 7 = 126/504 - Likewise, for the 2nd fraction, since 28 × 18 = 504,
27/28 = 27 × 18/28 × 18 = 486/504 - Add the two like fractions:
126/504 + 486/504 = 126 + 486/504 = 612/504 - 612/504 simplified gives 17/14
- So, 18/72 + 27/28 = 17/14
In mixed form: 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/72+27/28 18/72+54/28 18/72+27/56 54/72+27/28 18/72+81/28 18/72+27/84 90/72+27/28