Add 90/15 and 81/56
1st number: 6 0/15, 2nd number: 1 25/56
90/15 + 81/56 is 417/56.
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,
90/15 = 90 × 56/15 × 56 = 5040/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
81/56 = 81 × 15/56 × 15 = 1215/840 - Add the two like fractions:
5040/840 + 1215/840 = 5040 + 1215/840 = 6255/840 - 6255/840 simplified gives 417/56
- So, 90/15 + 81/56 = 417/56
In mixed form: 725/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30+81/56 90/45+81/56 90/75+81/56