Add 18/28 and 80/72
1st number: 18/28, 2nd number: 1 8/72
18/28 + 80/72 is 221/126.
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,
18/28 = 18 × 18/28 × 18 = 324/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
80/72 = 80 × 7/72 × 7 = 560/504 - Add the two like fractions:
324/504 + 560/504 = 324 + 560/504 = 884/504 - 884/504 simplified gives 221/126
- So, 18/28 + 80/72 = 221/126
In mixed form: 195/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/28+80/72 18/56+80/72 54/28+80/72 18/84+80/72 90/28+80/72