Add 28/15 and 90/56
1st number: 1 13/15, 2nd number: 1 34/56
28/15 + 90/56 is 1459/420.
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,
28/15 = 28 × 56/15 × 56 = 1568/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
90/56 = 90 × 15/56 × 15 = 1350/840 - Add the two like fractions:
1568/840 + 1350/840 = 1568 + 1350/840 = 2918/840 - 2918/840 simplified gives 1459/420
- So, 28/15 + 90/56 = 1459/420
In mixed form: 3199/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/15+90/56 28/30+90/56 84/15+90/56 28/45+90/56 28/75+90/56