Add 28/42 and 27/72
28/42 + 27/72 is 25/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 42 × 12 = 504,
28/42 = 28 × 12/42 × 12 = 336/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
27/72 = 27 × 7/72 × 7 = 189/504 - Add the two like fractions:
336/504 + 189/504 = 336 + 189/504 = 525/504 - 525/504 simplified gives 25/24
- So, 28/42 + 27/72 = 25/24
In mixed form: 11/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42+27/72 28/42+54/72 28/84+27/72 84/42+27/72 28/42+81/72