Add 12/15 and 90/7
1st number: 12/15, 2nd number: 12 6/7
12/15 + 90/7 is 478/35.
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,
12/15 = 12 × 7/15 × 7 = 84/105 - Likewise, for the 2nd fraction, since 7 × 15 = 105,
90/7 = 90 × 15/7 × 15 = 1350/105 - Add the two like fractions:
84/105 + 1350/105 = 84 + 1350/105 = 1434/105 - 1434/105 simplified gives 478/35
- So, 12/15 + 90/7 = 478/35
In mixed form: 1323/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/15+90/7 12/30+90/7 12/15+90/14 36/15+90/7 12/45+90/7 12/15+90/21 60/15+90/7 12/75+90/7 12/15+90/35 84/15+90/7 12/15+90/49