Add 7/81 and 84/28
1st number: 7/81, 2nd number: 3 0/28
7/81 + 84/28 is 250/81.
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,
7/81 = 7 × 28/81 × 28 = 196/2268 - Likewise, for the 2nd fraction, since 28 × 81 = 2268,
84/28 = 84 × 81/28 × 81 = 6804/2268 - Add the two like fractions:
196/2268 + 6804/2268 = 196 + 6804/2268 = 7000/2268 - 7000/2268 simplified gives 250/81
- So, 7/81 + 84/28 = 250/81
In mixed form: 37/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/81+84/28 7/81+84/56 21/81+84/28 35/81+84/28 49/81+84/28