Add 15/81 and 84/56
1st number: 15/81, 2nd number: 1 28/56
15/81 + 84/56 is 91/54.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 56 is 4536
Next, find the equivalent fraction of both fractional numbers with denominator 4536 - For the 1st fraction, since 81 × 56 = 4536,
15/81 = 15 × 56/81 × 56 = 840/4536 - Likewise, for the 2nd fraction, since 56 × 81 = 4536,
84/56 = 84 × 81/56 × 81 = 6804/4536 - Add the two like fractions:
840/4536 + 6804/4536 = 840 + 6804/4536 = 7644/4536 - 7644/4536 simplified gives 91/54
- So, 15/81 + 84/56 = 91/54
In mixed form: 137/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/81+84/56 45/81+84/56 75/81+84/56