Add 81/15 and 70/56
1st number: 5 6/15, 2nd number: 1 14/56
81/15 + 70/56 is 133/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 15 × 56 = 840,
81/15 = 81 × 56/15 × 56 = 4536/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
70/56 = 70 × 15/56 × 15 = 1050/840 - Add the two like fractions:
4536/840 + 1050/840 = 4536 + 1050/840 = 5586/840 - 5586/840 simplified gives 133/20
- So, 81/15 + 70/56 = 133/20
In mixed form: 613/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30+70/56 81/45+70/56 81/75+70/56