Add 5/15 and 90/7
1st number: 5/15, 2nd number: 12 6/7
5/15 + 90/7 is 277/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 7 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
5/15 = 5 × 7/15 × 7 = 35/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
90/7 = 90 × 15/7 × 15 = 1350/105 - Add the two like fractions:
35/105 + 1350/105 = 35 + 1350/105 = 1385/105 - 1385/105 simplified gives 277/21
- So, 5/15 + 90/7 = 277/21
In mixed form: 134/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/15+90/7 5/30+90/7 5/15+90/14 5/45+90/7 5/15+90/21 25/15+90/7 5/75+90/7 5/15+90/35 35/15+90/7 5/15+90/49