Add 80/28 and 28/72
1st number: 2 24/28, 2nd number: 28/72
80/28 + 28/72 is 409/126.
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,
80/28 = 80 × 18/28 × 18 = 1440/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
28/72 = 28 × 7/72 × 7 = 196/504 - Add the two like fractions:
1440/504 + 196/504 = 1440 + 196/504 = 1636/504 - 1636/504 simplified gives 409/126
- So, 80/28 + 28/72 = 409/126
In mixed form: 331/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/28+56/72 80/56+28/72 80/28+84/72 80/84+28/72