Add 7/28 and 4/81
7/28 + 4/81 is 97/324.
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,
7/28 = 7 × 81/28 × 81 = 567/2268 - Likewise, for the 2nd fraction, since 81 × 28 = 2268,
4/81 = 4 × 28/81 × 28 = 112/2268 - Add the two like fractions:
567/2268 + 112/2268 = 567 + 112/2268 = 679/2268 - 679/2268 simplified gives 97/324
- So, 7/28 + 4/81 = 97/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28+4/81 7/28+8/81 7/56+4/81 21/28+4/81 7/28+12/81 7/84+4/81 35/28+4/81 7/28+20/81 49/28+4/81 7/28+28/81