Add 72/28 and 72/81
1st number: 2 16/28, 2nd number: 72/81
72/28 + 72/81 is 218/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 81 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 28 × 81 = 2268,
72/28 = 72 × 81/28 × 81 = 5832/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
72/81 = 72 × 28/81 × 28 = 2016/2268 - Add the two like fractions:
5832/2268 + 2016/2268 = 5832 + 2016/2268 = 7848/2268 - 7848/2268 simplified gives 218/63
- So, 72/28 + 72/81 = 218/63
In mixed form: 329/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/56+72/81 72/84+72/81