Add 7/28 and 8/81
7/28 + 8/81 is 113/324.
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,
8/81 = 8 × 28/81 × 28 = 224/2268 - Add the two like fractions:
567/2268 + 224/2268 = 567 + 224/2268 = 791/2268 - 791/2268 simplified gives 113/324
- So, 7/28 + 8/81 = 113/324
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/28+8/81 7/28+16/81 7/56+8/81 21/28+8/81 7/28+24/81 7/84+8/81 35/28+8/81 7/28+40/81 49/28+8/81 7/28+56/81