Add 72/81 and 9/28
72/81 + 9/28 is 305/252.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 28 is 2268
Next, find the equivalent fraction of both fractional numbers with denominator 2268 - For the 1st fraction, since 81 × 28 = 2268,
72/81 = 72 × 28/81 × 28 = 2016/2268 - Likewise, for the 2nd fraction, since 28 × 81 = 2268,
9/28 = 9 × 81/28 × 81 = 729/2268 - Add the two like fractions:
2016/2268 + 729/2268 = 2016 + 729/2268 = 2745/2268 - 2745/2268 simplified gives 305/252
- So, 72/81 + 9/28 = 305/252
In mixed form: 153/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/81+18/28 72/81+9/56 72/81+27/28 72/81+9/84 72/81+45/28 72/81+63/28