Add 56/15 and 81/84
1st number: 3 11/15, 2nd number: 81/84
56/15 + 81/84 is 1973/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 15 × 28 = 420,
56/15 = 56 × 28/15 × 28 = 1568/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
81/84 = 81 × 5/84 × 5 = 405/420 - Add the two like fractions:
1568/420 + 405/420 = 1568 + 405/420 = 1973/420 - So, 56/15 + 81/84 = 1973/420
In mixed form: 4293/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/30+81/84 56/45+81/84 56/75+81/84